water and coffee pouring into a Splitflask dual-chamber tumbler
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a gif image of Splitflask in a car cup holder and then tossed on a car seat.
splitflask 2 drink tumbler opened with callout
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splitflask 2 drink tumbler with callout
splitflask 2 drink tumbler comparison with callout
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Splitflask hot and cold cross section
Splitflask in 4 colors: Best hot and cold tumbler


Sale price$49.00 USD Regular price$69.00 USD
Save 29%
Color:Harper White *SHIPS IN JULY*

In stock and ready to ship.



Harper White

$34.00 $42.00

Fits Cupholders

Non-Slip Bottom

4hrs Hot | 12hrs Cold

No Spill / No Mix

SPLITFLASK Insulated water bottle


Introducing the 2-in-1 insulated water bottle solution for your coffee and hot beverage needs – the Splitflask! This innovative hot and cold stainless steel tumbler combines the functionality of two separate vessels into one sleek and stylish design. With its patented dual-chamber technology, you can enjoy your favorite coffee or tea hot and fresh, while keeping your water chilled and refreshing. This 30 oz insulated tumbler features a leak-proof seal and a stainless steel construction that is both durable and easy to clean. The spacious interior allows you to carry up to 30 ounces of your favorite beverage, and the handy lid ensures that your drinks stay hot or cold for hours. Say goodbye to disposable cups and enjoy the convenience and sustainability of Splitflask.

  • Anti-Scalding and Leak-Proof: The Splitflask features anti-scalding technology that keeps your hands safe from burns. It is also leak-proof, so you can carry it in your bag without worrying about spills.

  • Heat Resistant and Non-Slip: This tumbler is heat resistant so you can enjoy a steaming cup of coffee without burning yourself. Its non-slip design ensures a secure grip even when you're on-the-go or driving.
  • Cup Holder Friendly: The sleek design of this tumbler makes it cup holder friendly and perfect for commuting or traveling.
  • No Mixing: With two chambers in one water bottle, there's no need to worry about mixing flavors. You can carry two different drinks without compromising on taste!
  • BPA & BPS Free: This product is completely BPA & BPS free ensuring that there are no harmful chemicals used in its manufacturing process, making it safe to use daily!
  • Dishwasher Safe: While the Splitflask is top rack dishwasher safe for your convenience, Low heat drying or handwashing is advised to prolong its lifespan, ensuring lasting durability and hygiene.
  • Patent-Pending Modern Design: Its patent-pending modern style gives an edge over other tumblers available in the market.
  • 30OZ Volume with Solid Pattern: With a volume of 30oz and solid patterned exterior makes sure that this will be an eye-catching addition to any kitchenware collection.
  • Temperature Hold Time 4-12 Hours: Enjoy up to 12 hours with cold beverages or up to 4 hours with hot beverages throughout any journey! 

Here's a Youtube video of the Splitflask hot and cold tumbler in action:


    1. Dual-Chamber Design: Equipped with two separate 15 oz compartments, allowing for the storage and enjoyment of two distinct beverages.
    2. Temperature Control: Independently insulated compartments maintain the desired temperature of each beverage—hot or cold—ensuring optimal refreshment.
    3. Flavor Integrity: Prevents mixing of flavors, preserving the unique taste of each beverage throughout consumption.
    4. Elegant Aesthetic: A sleek and stylish design that combines functionality with aesthetic appeal, creating a sophisticated beverage companion.
    5. Durable Build: Crafted from high-quality 18/8 stainless steel, ensuring longevity, resistance to corrosion, and a safe container for your drinks.
    6. Convenient Size: Compact dimensions and a 30 oz overall volume offer ample capacity while remaining easy to carry and store.
    7. Easy to Clean: Stainless steel construction allows for easy cleaning, maintaining hygiene and the integrity of your beverages.
    8. Saves Space and Hassle: Forget about the hassle of carrying multiple bottles. Splitflask's versatile design reduces clutter, saves space, and simplifies your on-the-go hydration routine.
    9. Leak-Proof: Carefully engineered seals and closures ensure a leak-proof experience, protecting your belongings from spills.
    10. Versatile Use: Perfect for a wide range of beverages, from water and coffee to smoothies and more, making it suitable for various occasions and activities.


    How big is a 30oz tumbler?

    • Volume: 30 oz (900 ml)
    • Dual-Chamber Volume: Each chamber holds 15 oz (450 ml)
    • Dimensions: 200mm (Length), 105mm (Top Width/Diameter), 80mm (Bottom Width/Diameter)
    • Weight: 1.1lbs
    • Material: High-quality food-grade 18/8 stainless steel

    Does your 30 oz tumbler fit in a cup holder?

    Yes. Our 30 oz dual-chamber 2-in-1 tumbler with Dual-Sip Lid are designed to fit in a standard cupholder. Cupholder dimension is a minimum of 3.5 inches in diameter. The Splitflask 30 oz tumbler base is 3.1 inches in diameter.

    Package Includes:

    • 1 Splitflask 30 oz with Dual Chambers
    • Care and Maintenance Instructions

    Note: All specifications are subject to minor variations due to the manufacturing process.


    Dual Chambers: Splitflask has two separate sections.

    Temperature Control: Both chambers are vacuum insulated. This helps keep drinks at their desired temperature for hours.


    1. Hot & Cold: Put a hot drink (like coffee) in one chamber and a cold drink (like iced water) in the other.
    2. Hot & Hot: Place two hot drinks in both chambers to keep them warm longer.
    3. Cold & Cold: Store two cold drinks in each chamber to keep them cool for an extended time.


    Saves 167 plastic water bottles each year

    Saves 167 plastic water bottles & 150 plastic coffee cups each year

    Sip Independently From Each Side

    Our unique Dual-Sip™ lid lets you sip from each side whenever you desire, granting you the freedom to enjoy both beverages at your own pace.

    Hot Stay Hot, Cold Stays Cold

    Whether it's piping hot coffee on one side or ice-cold lemonade on the other, each side preserves your preferred temperature without any mixing or spilling.

    No Spills, No Leaks, No Problem

    Enjoy worry-free hydration with the Splitflask, designed for a spill-free and leak-proof experience, ideal for active lifestyles or busy commutes.

    Splitflask hot and cold tumbler with silicone base and powder coated shell


    Your Satisfaction Is Guaranteed.

    We love Splitflask™ and are confident you will too! That’s why we're offering a 30-Day, Risk-Free Trial. If you're not obsessed with it, we'll give you a refund.


    We offers a stress-free, 30-day return policy.We made it super easy to return your products. Head over to our 'Contact Us' page.

    Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.

    It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

    Each side can hold up to 15 ounces of liquid for a combined total of 30 ounces.

    Yes. Each side is independently vacuum-insulated to prevent temperature loss or gain from either side. So hot stays hot and cold stays cold.

    Yes. Splitflask is dishwasher safe.

    Yes. Splitflask is BPA and BPS-free.

    Yes. Splitflask will fit in your car’s cup holder.

    Splitflask is designed with two 15oz chambers for a total of 30oz.

    No. In order to preserve the minimal design aesthetic, Splitflask does not come with a handle. However, we have developed a removable handle attachment accessory which will be available for purchase soon. For now, we do offer a Bottle Sling that you can purchase in our store.

    You can purchase replacement straws, lids, and other accessories from our store.

    Yes. Unlike many other cups in the market, we knew a water bottle that spilled was a dealbreaker for our discerning customers. So we designed a no-spill and no-mix Dual-Sip™ lid.

    No. Our Dual-Sip™ lid is spill-proof and mix-proof, ensuring that both beverages stay out until you are ready to enjoy them independently.

    You can contact us through our contact page or email us at hello@splitflask.com or visit our Contact Us! We will be happy to assist you.

    Yes. Our 30 oz dual-chamber 2-in-1 tumbler with Dual-Sip Lid are designed to fit in a standard cupholderCupholder dimension is a minimum of 3.5 inches in diameter. The Splitflask 30 oz tumbler base is 3.1 inches in diameter.

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    The Best Hot and Cold Tumbler

    Welcome to the dynamic world of hot and cold tumblers! Whether you're sipping on a hot latte or a refreshing iced tea, or both, the right tumbler can make all the difference. This guide will delve into the essentials of hot and cold tumblers, exploring their evolution, types, and Splitflask is the best hot and cold tumbler for your needs.

    Definition and Overview

    A hot and cold tumbler is a versatile container designed to maintain the temperature of your beverage – hot or cold, for a long period of time thanks to its insulated construction. It's an indispensable accessory for anyone looking to enjoy their favorite beverages on the go.

    Evolution of Tumblers for Temperature Retention

    Tumblers have come a long way from their humble beginnings in 1913, when they were invented by William Stanley. Today, modern tumblers are marvels of insulation technology, offering superior temperature retention and durability, making them ideal for both hot and cold drinks.

    Types of Tumblers

    The world of tumblers is diverse, with each type catering to specific preferences, applications and needs.

    Varieties with Straws and Lids

    Hot and cold tumblers with straws and lids are a popular choice for their convenience, versatility, and enhanced insulation efficiency they offer. They're perfect for those who are constantly on the move, providing an easy way to enjoy your drink without spills or leaks.

    Material Comparison

    The choice of material is crucial in determining a tumbler's effectiveness.

    Stainless Steel vs. Plastic Tumblers

    Stainless steel tumblers like the Splitflask are celebrated for their durability, robustness and superior insulation, while plastic tumblers offer a lightweight and often more economical alternative. However, they may fall short in comparison when it comes to maintaining temperatures and aesthetics.

    Finding the Best Tumblers

    Choosing the right tumbler for both hot and cold drinks requires careful consideration of several factors. We've made that choice easier by creating a tumbler that carries and maintains the temperatures of hot and cold drinks at the same time.

    Best Tumblers for Both Hot and Cold Drinks

    Unless you don't mind the inconvenience of having to carry two tumblers when you need your hot and cold drinks at the same time, the the clear and only choice is Splitflask. Splitflask–the best tumbler for both hot and cold drinks features top-notch insulation, a durable build, and a lid design that not only is leak proof, but is also mix proof and allows you to sip independently from each side.

    Essential Features of Tumblers

    Knowing what features to look for can guide you in selecting the perfect tumbler.

    Features to Look For

    Features like temperature retention time, volume, BPA/BPS-free, leak-proof lids, ergonomic designs, and the quality of the seal are all important factors to consider when selecting the best hot and cold tumbler for your needs. These contribute to the tumbler's efficiency in maintaining the desired temperature. Splitflask checks all those boxes and more.

    How Tumblers Maintain Temperature

    The magic of temperature retention in tumblers lies in their vacuum insulation technology. Understanding this science can help you appreciate their design and make a more informed purchase.

    Science Behind Insulation

    Most high-end tumblers like Splitflask use double-wall vacuum insulation, an effective method of reducing heat transfer, thereby maintaining the internal temperature irrespective of the external environment. But unlike all other hot and cold tumblers on the market, Splitflask goes a step further by incorporating an additional double-wall vacuum between the left and right insulated chambers to prevent temperature transfer between both chambers.

    Comparison with Regular Bottles

    Insulated tumblers surpass regular non-insulated bottles in their ability to keep drinks at a consistent temperature for long periods of time, thanks to their specialized design and construction focused on thermal retention.

    Hot and Cold Tumbler Brands

    The market boasts a variety of brands, each offering unique features and technologies. All brands pretty much offer the same (or variations of the same) features except Splitflask which offers a patented dual chamber feature never before seen on the market.

    Leading Brands in the Market

    Brands like Yeti, Hydro Flask, Contigo, and Thermos are household names in the tumbler world, each bringing their own flair to the table. But not of them can offer the dual beverage option that Splitflask offers.

    Brand-specific Features and Technologies

    Understanding the unique features and technologies of these brands can help you zero in on the tumbler that best suits your requirements. All brands on the market offer similar features, making Splitflask a standout brand with its dual-chamber design.

    The Versatility of Tumblers

    Tumblers are incredibly versatile, suitable for a wide range of beverages. Thanks to their stainless steel construction, they are quite adept at living up to their promise.

    Suitability for Various Drinks

    Whether it's keeping your morning coffee hot or your water cold, tumblers are designed to handle various drinks, one drink at a time, thanks to their insulated properties. Splitflask is designed to handle two drinks at a time.

    User Experiences

    User experiences often underline the practical benefits of tumblers in daily life. Their widespread use is a testament to their versatility and convenience with millions of hot and cold tumblers being sold ever year in America alone.

    The Best Tumbler for Temperature Retention

    To find the best tumbler for temperature retention, consider factors like insulation quality, material, design, and user reviews.

    Expert Recommendations

    Experts often suggest opting for tumblers with double-wall vacuum insulation for the best temperature retention. The material and seal quality are also important considerations. Splitflask offers double-wall vacuum insulation and an airtight seal for your convenience.

    Consumer Ratings and Feedback

    Consumer ratings and feedback are invaluable for understanding the real-world performance of different tumblers. Splitflask reviews help to highlight aspects like temperature maintenance, durability, and convenience.

    Advantages of Insulated Tumblers

    Insulated tumblers offer several benefits, making them an optimal choice for both hot and cold drinks.

    How Insulation Works

    Insulation in a tumbler works by creating a vacuum barrier against heat transfer. The vacuum between the Splitflask tumbler walls is devoid of air molecules which prevents heat from escaping or entering each chamber, simultaneously maintaining the drink's temperature in each chamber.

    The Purpose of Insulated Tumblers

    Insulated tumblers are designed not just for temperature retention but also to promote a sustainable and eco-friendly lifestyle. They reduce the reliance on plastic disposable cups and water bottles, thereby minimizing waste and environmental impact. With Splitflask, you get to double you environmental impact. It's not just about the convenience of having your drinks at the right temperature; it's also about making the best eco-friendly choice.

    The Splitflask Convenience

    The Splitflask insulated tumbler is designed for maximum convenience. It is leak-proof & mix-proof, easy to carry, dishwasher safe, BPA/BPS-free, fits well in most cup holders, reduces twice as much single-use plastic, and allows you to carry 2 drinks in 1 cup, making them it the most ideal and eco-friendly choice for all occasions.