A Revolution in Hydration: Your Coffee and Water in The Same Cup

Introducing the world's first dual tumbler for your hot and cold beverage needs–the Splitflask! This innovative stainless steel tumbler combines the functionality of two separate vessels into one sleek and stylish design. With its patent pending dual-chamber technology, you can enjoy your hot coffee and cold water simultaneously.

“As someone who needs caffiene *and* hydration on the go, this tumbler is a game-changer. The dual chambers keep my coffee hot and water cold for hours. Genius idea!”

– Hayley Zovickian, Buzzfeed

Two Drinks, One Cup, Endless Possibilities

Whether it's water and coffee, tea and lemonade, beer and soda, pre-workout and post-workout, or even a little something extra, Splitflask ensures that each sip is an experience worth savoring. No more juggling two water bottles—just pure, uninterrupted refreshment!

Splitflask vs. Stanley: Two Chambers, Twice the Fun

Think of Stanley as that old-school friend who never quite got the memo about multi-tasking. With just one chamber, it’s basically telling you to pick a side—hot or cold.

Meanwhile, Splitflask goes, “Why not both?” So if you’re tired of compromise, give Stanley the side-eye and sip from Splitflask—double the drinks, double the fun, no regrets.

SEPARATE INSULATED COMPARTMENTS

The water and coffee compartments are completely isolated and thermally insulated, ensuring that each drink maintains its ideal temperature without influencing the other.

This advanced insulation not only keeps your hot drinks hot and cold drinks cold for hours but also prevents any temperature transfer to the exterior of the tumbler.

With Splitflask, you can confidently carry both beverages without worrying about leaks, condensation, or compromised performance.

Special Features

  1. 20oz in each side.
  2. Flip up straw for the perfect sip.
  3. See-through cover for a clear view of your beverages.
  4. Food grade 18/8 stainless steel core.
  5. Double wall vacuum insulated separation of compartments.
  6. Dual Sip lid allows you to drink from each side separately.
  7. Food-grade silicone straw.
  8. Built-in silicone base for protection and noise-dampening.
  9. BPA/BPS free and no lead like the other guys.
  10. Carry two cold drinks, two hot drinks or a cold and a hot drink at the same time.
  • Temperature Independence Temperature Independence
  • DISHWASHER SAFE DISHWASHER SAFE
  • Flavor Integrity Flavor Integrity
  • Spill Proof Spill Proof
  • Ergonomic Design Ergonomic Design
  • Dual Sipℱ Lid Dual Sipℱ Lid
  • Temperature Independence Temperature Independence
  • DISHWASHER SAFE DISHWASHER SAFE
  • Flavor Integrity Flavor Integrity
  • Spill Proof Spill Proof
  • Ergonomic Design Ergonomic Design
  • Dual Sipℱ Lid Dual Sipℱ Lid

Your Hydration Simplified in 3 easy steps

two drinks being poured into an illustration of Splitflask

Simply pour your drinks into each chamber one at a time.

The lid moving downwards on an illustration of Splitflask

Place the lid with the straw side over your cold drink and the spout side over your hot drink.

Arrows showing how you use the lid in an illustration of Splitflask

Lift the straw to sip your cold drink or the spout to swig your hot drink.

Loved By Drew Barrymore

"No More double-fisting your drinks".

Lady pouring hot coffee into a black Splitflask tumbler
Based on 1379 reviews

Over 1000+ 5-Star Reviews OF Our 30oz Version

Alex T.

"After sampling various products, I stumbled upon the perfect choice with this brand; I love the feature of combining coffee and water in one bottle."

Anna R.

“I've used Splitflask for months and also got one for my husband. It's perfect for hikes, keeping you hydrated, energized, and hands-free. It's convenient for carrying water and tea in one bottle.”

David L.

"I absolutely love my Splitflask! It's a game-changer for my busy mornings. I can take both my coffee and water without having to carry two separate bottles. The divider in the middle is genius and keeps my drinks perfectly separated."

Jonathan C.

"The SplitFlask is fantastic! It keeps my iced water and hot coffee perfectly separated and at the right temperatures. The design is brilliant, stylish, and well-made. It's a must-have for staying hydrated and caffeinated on the go. Highly recommend!"

Mary W.

"SplitFlask delivers on its promises! It keeps my smoothie chilled and my tea hot for hours. The sleek design is easy to clean, making it perfect for anyone with multiple beverages on the go. I'm extremely satisfied with my purchase."

From the mind of a NICU Nurse ♄

The idea for Splitflask came from a simple daily challenge I faced as a NICU nurse: I could only bring one drink container to work. This rule often forced me to choose between my morning coffee and staying hydrated with water throughout my shift. My husband noticed the trail of half-finished Starbucks lattes I’d leave in the car, and he realized the waste wasn’t just about the coffee—it was about having to choose between two essentials because of workplace rules.

Seeing my frustration, we envisioned a solution: a flask that could hold both hot and cold drinks at the same time. With this, I wouldn’t have to sacrifice my coffee for water or the other way around. That’s how Splitflask was born—a simple yet innovative answer to a problem many of us face, designed to make life just a little bit easier.

Splitflask founder Cheryl
Splitflask founder Cheryl

Frequently asked questions

Will Splitflask really keep drinks both hot and cold at the same time?

Absolutely! Splitflask’s advanced double-walled vacuum insulation technology provides two separate thermal environments within one bottle. This ensures your iced tea stays perfectly chilled while your hot coffee remains deliciously warm for hours.

Will Splitflask fit in my car cupholder?

Absolutely. Splitflask fits in the majority of car cup holders.

Is Splitflask dishwasher safe?

Yes, Splitflask is dishwasher safe! You can conveniently place it in the dishwasher for easy cleaning without worrying about damaging its durable stainless steel construction or leak-proof seal.

What if I forget which side is hot and drink from it by mistake?

We’ve built two unique features into the Splitflask DualSip lid to help you easily distinguish between the hot and cold sides:

  1. Clear See-Through Lid: The lid is made from transparent material, allowing you to see inside each chamber. You can typically identify the hot side by the condensation patterns—one side may appear foggy while the other remains clear.

  1. Dual Openings for Hot & Cold: The lid features two distinct openings—a flip-up straw for cold drinks and a flip-up spout for hot drinks. Simply check which one you’re using to instantly know whether you’re sipping something hot or cold.
Powered  By Splitflask trademarked logo - black