Splitflask Tighter Seal Gasket
Carry two drinks in one cup.
Best for people who carry two drinks daily
Because carrying two drinks is annoying.
Proof
Yes, it actually works.
How You'll Use It
Coffee + Water
The ultimate office companion. Stay caffeinated and hydrated without the clutter.
Pre + Post Workout
Energy before, recovery after. All in one hand.
Engineered for your lifestyle
Carry less
One vessel replaces two bulky bottles. Clean up your commute.
Hot + cold together
Carry both without carrying both.
Separate chambers
Dual-wall vacuum insulation keeps flavors perfectly isolated.
Leakproof lid
Secure alignment technology ensures zero spills in your bag.
Cupholder friendly
Tapered base fits 99% of standard car cup holders.
Dishwasher safe
No complex parts. Pop it in the top rack and you're done.
A few things to know before you buy.
Lid Alignment
Size Matters
Easy Cleaning
Temperature Influence
The Splitflask Advantage
| Feature | Regular Tumbler | Splitflask |
|---|---|---|
| Drink Capacity | 1 Drink | 2 Drinks |
| Dual Temp Control | YES | |
| Carry Profile | Cluttered | Streamlined |
| Dishwasher Safe | Sometimes | 100% Yes |
Swipe to compare
Built for real-life use—not sitting untouched for hours.
Every product has tradeoffs. Here's how to think about this one:
-
It replaces two cups → so it's bigger
-
It takes one use to get right → then it's easy
-
It's built for daily use → not extreme insulation
— A candid note from our founders
What users are saying
Verified Reviews
Game changer
Perfect
Doesn't leak
Frequently Asked Questions
Do the drinks ever mix?
No. The chambers are physically separated by a stainless steel wall and the lid features dual silicone seals to keep liquids and flavors 100% isolated.
How long does it keep temperature?
For real-life use—like your commute or workout—both sides stay comfortably drinkable. Because hot and cold are side by side, performance isn't the same as single-purpose thermoses.
Why people switch
Not because it's a better tumbler.
Because it replaces two.