Two Drinks, One Bottle.
4.7/5 · 1,057 verified reviewsBest for people who carry two drinks daily
Proof
How to use
Listen to Christina tell you all about the Splitflask and how it changed her life.
Step 1
Add your two favorite drinks–cold & cold, hot & hot or hot & cold.
Step 2
The lid allows you to drink form each side without having to switch the lid.
Step 3
Your drinks stay separated without mixing or leaking.
Every product has tradeoffs. Here's how to think about this one:
— A candid note from our founders
The ultimate office companion. Stay caffeinated and hydrated without the clutter.
Carry more with less for those long errand days.
Energy before, recovery after. All in one hand.
One side for baby, leaving mom's side backwash-free.
Perfect for success on your GLP-1 weight-loss journey.
One vessel replaces two bulky bottles. Clean up your commute.
Carry both without carrying both.
Dual-wall vacuum insulation keeps flavors perfectly isolated.
Secure alignment technology ensures zero spills in your bag.
Tapered base fits 99% of standard car cup holders.
No complex parts. Pop it in the top rack and you're done.
"Anyone else run out of the house with a hot tea and yet you want your cold bottle of water, and you feel like you're juggling. It's combersome. With the Splitflask two-sided tumbler, you get two drinks in one. – Drew Barrymore
| Feature | Regular Tumbler | Splitflask |
|---|---|---|
| Drink Capacity | 1 Drink | 2 DRINKS |
| Dual Temp Control | No | YES |
| Carry Profile | Inconvenient | CONVENIENT |
| Dishwasher Safe | Sometimes | YES |
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Verified Reviews
Before you buy
Every product has tradeoffs.
Splitflask's tradeoff is simple:
It's larger than a regular tumbler and takes one use to learn.
In return, you stop carrying two drinks everywhere.
Most people decide that's a trade worth making.
We typically respond within 24–48 business hours. Real humans read every message.
RETURNS & SUPPORT
If you buy through Amazon, Amazon's return policy applies.
If you buy through Splitflask.com, see our return policy page for current return options.
Of course. You're not required to use both chambers.
Yes. You can use both sides however you'd like.
Absolutely. Many customers use: Water + electrolytes Sparkling water + still water Two different flavored drinks
USING IT
A tiny one.
The biggest thing to remember is aligning the lid correctly with the divider.
Most people figure it out after their first use.
CLEANING
Not at all. Most people use: Dishwasher, Bottle brush, or Straw brush. Like any insulated tumbler, occasional deep cleaning is recommended.
Yes. Top rack recommended.
SIZE & WEIGHT
Each chamber holds approximately 15 oz.
Together, that's 30 oz total.
Yes. Splitflask is designed to fit most standard vehicle cup holders.
It's heavier than a standard tumbler because it's carrying two drinks instead of one. Think of it this way: You're replacing two containers with one.
TEMPERATURE QUESTIONS
No. This is a two-drink solution. It's built for people who want to carry two drinks in one cup—not people trying to keep coffee untouched all day.
Over time, some temperature influence is normal. You're carrying a hot drink and a cold drink in the same container. The tradeoff is convenience: one cup instead of two. For most daily routines, commutes, workouts, and workdays, both drinks remain enjoyable and usable.
Yes. That's one of the most common ways people use Splitflask. Coffee + water is one of our customers' favorite combinations.
THE BIG QUESTIONS
When the lid is aligned correctly and fully closed, it is designed to keep both chambers sealed. Most leak complaints come from incorrect lid alignment.
Because most people already carry two drinks. Coffee + water. Electrolytes + hydration. Pre-workout + water. Tea + water. Splitflask lets you carry both in one place instead of juggling two separate containers.
Honestly? No. If you're looking for a cup that keeps a drink untouched for 8+ hours, there are better options. If you're tired of carrying two drinks everywhere, that's exactly why Splitflask exists.
Yep. Coffee + tea. Water + juice. Whatever you want.
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.
Hot side: above 120°F for up to 2 hours. Cold side: below 50°F for up to 4 hours, run side-by-side.
Not because it's a better tumbler.
Because it replaces two.
Overall rating: 4.8949857 / 5 from 1057 reviews.
Review topics: [].
"While the flask keeps cold cold and hot hot, it is on the very side to carry around."
"I love this travel mug! I’ve only used/had it for a few days but so far it’s wonderful to only take 1 cup with me! It’ll be even better when I a get a handle for it!"
"Excellent product and customer service. I purchased 2 as gifts. My daughter is enjoying them. We are considering the bigger size for road trips."
"I like my mug purchase and I bought 2 extra for family members but noticed that when drinking from the non-straw side that if the other side is filled it tends to combine liquid contents with each other. Not cool and things don’t stay cold for as long as advertised."
"Love the versatility and unique design. It’s a bit heavy, even when empty. . & with no handle options, I’m afraid of dropping it. Also I’m refilling each side several more times than expected, especially when I’ve is used. . but at least I know I’m getting my fluids in! Overall, I’m very pleased with my purchase."
"I love the concept of hot coffee, water, or tea on one side while the colder beverage is on the other side. The ice didn’t last long and the coffee became cold after an hour. I was so excited about it but after washing it and using it in one day it was just another cup."
"I love my cups but we didn't get a sling bag n I bought 2 of em"
"Super cool BUT it took four months to come in. Super slow with a ton of excuses of why and when. Get ready for a wait."
"I still have received my split lid that I ordered last year"
"Best customer service I have had in a while. Cheryl went above and beyond while helping me."