⭐️⭐️⭐️⭐️⭐️ 30,000+ Customers

Stop Juggling. Start Sipping.

Two drinks. One hand. Zero compromise.

GET YOUR $49.95 ➜

You're Doing Too Much

Your coffee's in one hand. Water bottle's wedged under your arm. You're trying to open a door. Your phone's ringing. Something's about to spill.

Sound familiar?

Or maybe you're the person with three cups on your desk. One's room temperature. One's empty. You can't remember which is which.

THERE'S A BETTER WAY

How It Works

Dual-Chamber Technology (That Actually Works)

1

True Separation

Two completely isolated 15oz chambers. Your iced latte won't water down your matcha. Your tea won't cool your cold brew. Physics, done right.

2

Temperature Lock

Vacuum-insulated stainless steel keeps hot drinks hot for 6+ hours, cold drinks cold for 8+ hours. Same cup. Same time. No thermal bleed.

Splitflask dual-chamber tumbler
3

Zero-Leak Lid

Quarter-turn seal locks both chambers. Straw on one side, spout on the other. Align the center strips and you're leak-proof. (Yes, we tested it upside down.)

4

Fits Anywhere

30oz total capacity. Fits standard cup holders. Dishwasher safe. No hand-washing tiny parts at 11pm.

Customer Reviews

What 1,000+ Customers Actually Said

Jackie M.
★★★★★

"I was skeptical that it could keep something hot and something else cold at the same time, but I am happy to report IT DOES!"

Cheryl B.
★★★★★

"As a mom of 4 kids my hands need to be free. I soft tossed it to my bed because I was doing laundry and no leakage at all!"

Michael T.
★★★★★

"I've been dreaming of this product for years. Thank you to whoever came up with this!"

Sam C.
★★★★★

"For years I wished I had 1 cup that was double sided so I could have electrolytes on one side and water on the other. I needed this cup before I even knew it existed."

Stop Carrying Two Cups

You've been doing it the hard way for too long.

Be like Drew!

Get the only tumbler that does what Splitflask does—because we literally patented it.

Get Your Splitflask - $49.95
Patent-Protected Design
1,000+ 5-Star Reviews
Dishwasher Safe
Free Shipping Over $50

FAQ's

How long does it keep drinks hot/cold?

Hot drinks: 2-4 hours. Cold drinks: 4-6 hours. Some customers report ice still solid after 7 hours.

Can I put both sides in hot? Or both in cold?

Yep. Coffee + tea. Water + juice. Whatever you want.

Is it dishwasher safe?

Yes. Top rack recommended.

Does it fit in a backpack/bag?

It's leak-proof when the lid is aligned correctly. Customers throw it in bags all the time.

What if I get a defective unit?

We replace it. Free. Fast. (Check the reviews—our customer service is mentioned a lot.)