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Patented Dual-Chamber Technology

Two Drinks

The world's first dual-chamber tumbler invented by a NICU nurse. Carry hot coffee and cold water simultaneously without compromise.

Temperature Performance

Hot Coffee 185°F
Maintains heat for 6+ hours
Cold Water 35°F
Stays cold for 12+ hours
HOT
Coffee
COLD
Water
Split Flask Inventor
Invented by a NICU Nurse

Innovation Born from
Necessity

As a NICU nurse, I faced a daily dilemma: choose between my essential morning coffee or staying hydrated with water. My frustration sparked an idea to create Split Flask, a single container that holds both hot and cold drinks, so no one has to choose again.

RN
Registered Nurse & Inventor
Split Flask Creator
"I created Split Flask because I was tired of having to choose between my coffee and water during long shifts. Now you never have to compromise on your hydration needs."

Patented Technology

Advanced double-walled vacuum insulation creates two separate thermal environments within one bottle

Split Flask Technology

Dual-Sip™ Lid Technology

Independent drinking spouts prevent mixing and allow you to enjoy each beverage separately without flavor contamination.

Triple Insulation System

Double-wall vacuum insulation on each chamber plus an additional barrier between chambers prevents temperature transfer.

100% Leak-Proof Design

Advanced sealing technology ensures no spills or leaks, making it safe to toss in your bag or backpack.

Premium Features

Every detail crafted for the ultimate dual-beverage experience

Perfect for ADHD & Neurodivergents

Research shows having multiple drink options helps with sensory stimulation and reduces decision fatigue.

Car Cupholder Friendly

Fits perfectly in most car cup holders, making it ideal for commutes and road trips.

Eco-Friendly Choice

Reduce single-use plastic waste by carrying two drinks in one container instead of multiple bottles.

Dishwasher Safe

Easy cleaning with dishwasher-safe components. Hand-washing recommended for optimal longevity.

Perfect Balance

15oz per chamber (30oz total) provides the ideal capacity for both beverages without being too heavy.

Clear View Lid

See-through cover lets you easily identify which drink is which without opening the lid.

Split Flask Premium Lifestyle
4 Premium Colors Available

Choose Your
Style

Available in 4 sophisticated colors to match your personal style and lifestyle needs.

Select Your Color

Harper White
$39.99
Hartley Black
$39.99
Elle Pink
$42.99
Guy Green
$42.99
$49.99 $39.99

Limited time offer - Save $10!

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1000+ 5-Star Reviews

Why Split Flask
Wins

See how Split Flask compares to traditional tumblers

ONE DRINK
HOT
COLD

One Container

Carry two drinks in one sleek container instead of juggling multiple bottles.

Independent Temperatures

Hot stays hot, cold stays cold - no temperature mixing or compromise.

Cost Effective

One premium tumbler replaces the need for multiple single-purpose containers.

Eco-Friendly

Reduce plastic waste by eliminating the need for disposable bottles.

Traditional Tumblers

Stanley, Hydro Flask, Yeti

Single beverage only
Carry multiple containers
Juggle drinks throughout day
More single-use plastic waste
Choose between coffee OR water

Split Flask

The Original Dual-Chamber

Two beverages simultaneously
One convenient container
Hands-free hydration
Reduces plastic waste by 50%
Coffee AND water together
50,000+
Happy Customers
1,000+
5-Star Reviews
30oz
Total Capacity
100%
Leak-Proof

Loved by Thousands

Join thousands of satisfied customers who've revolutionized their beverage experience

"Absolutely game-changing! I can have my hot coffee and cold water in the same container. Perfect for long commutes and busy mornings. No more choosing between caffeine and hydration!"
HZ
Hayley Zovickian
Buzzfeed Employee
"The build quality is exceptional and the temperature retention is incredible. Worth every penny! I've used mine for months and also got one for my husband. Perfect for hikes and keeping hands-free."
DL
David L.
Verified Buyer
"I'm a teacher and this has saved my mornings. Hot coffee and cold water all in one meaning I don't have to juggle my drinks anymore. Absolute genius. Every mom should have this."
AT
Alex T.
Teacher & Mom
⭐
"No More double-fisting your drinks"
Drew Barrymore
Actress & Talk Show Host

Ready to Transform
Your Daily Routine?

Join 50,000+ customers who've discovered the convenience of carrying two drinks in one container.