Free shipping over $50 · 30-day returns Lifetime warranty
FOR THE GLP-1 ROUTINE Protein in one chamber. Electrolytes in the other.

For the GLP-1 routine

Small appetite.
Big protein goals.

On a GLP-1, hitting your protein and hydration targets stops being about willpower and starts being about logistics. Splitflask carries both - protein in one chamber, electrolytes in the other - in one hand, all day.

Splitflask Editorial
By Splitflask Editorial Updated June 2026
One cup for the two daily targets everyone keeps talking about.

Created by a NICU nurse and mom of 3

Built by someone who understands that routines only work when real life leaves room for them.

★ 4.7 Verified rating
30,000+ Sold
15oz + 15oz Dual chamber
Get the Splitflask 30oz →
Splitflask with one side for hydration and the other for nourishment

The daily math

Your appetite changed. Your targets didn't.

Anyone on this journey knows the daily math: protein first, always. Fluids all day, even when you're not thirsty - especially when you're not thirsty. Electrolytes because your body's running on a new operating system.

So you do what everyone does. A shaker bottle. A water bottle. Maybe a third thing for electrolytes. Your bag turns into a beverage cart, and you still forget one on the counter.

The routine isn't the hard part anymore. Carrying it is.
Person juggling separate water and protein bottles The two-bottle problem
One Splitflask system with water and protein in one cup One cup. Both targets.
Get the Splitflask 30oz →

The protocol

One cup. The whole protocol.

15oz happens to be exactly a standard protein shake. We'd love to say we planned that. We planned that.

Left chamber - 15oz

Your protein shake. Vacuum insulation keeps it actually cold - because warm protein shake is a crime we refuse to be part of.

Right chamber - 15oz

Your electrolyte water. Sip it through the meeting, the school run, the errands. It's in your hand, so you actually will.

Zero crossover

A solid steel wall between chambers. Your vanilla shake will never taste like lemon-lime electrolytes. Ever.

Genuinely leakproof

Dual-sealed lid. Gym bag, work bag, diaper bag: all safe.

One hand, all day

Fits your car cup holder, the treadmill caddy, and your life.

Built for people who sip all day: both drinks stay with you for hours, at temperature, so the protocol happens on autopilot instead of by alarm.
Get the Splitflask 30oz →

Why it works

Built for people who sip all day.

GLP-1 life is small, frequent sips - not chugging. That's exactly what a dual-chamber cup is good at: both drinks stay with you for hours, at temperature, so the protocol happens on autopilot instead of by alarm.

Honest note: Splitflask is built for real daily use - a commute, a workday, a workout. If you need a shake to stay ice-cold for 24 hours in a hot car, get a single-purpose thermos. If you need your protein and your fluids with you from 7am to 3pm, this is the one.

From people on the same journey.

The clearest feedback we hear is simple: carrying protein and hydration together makes the routine easier to repeat.

30,000+ sold

A simple product for a very specific daily problem: carrying the two drinks your routine already asks for.

Created by a NICU nurse

Designed with practical daily routines in mind, not another overcomplicated wellness hack.

Get the Splitflask 30oz →

Splitflask® 30oz Dual-Chamber Tumbler

15oz + 15oz. $49.95 - or $12.49/mo with Shop Pay.

Protein + Hydration System
Splitflask 2-in-1 dual chamber stainless steel travel mug in matte finish
Splitflask® 30oz Dual-Chamber Tumbler
Protein in one hand. Hydration in the same hand.
  • Two fully separate vacuum-insulated chambers
  • Leakproof dual-sealed lid
  • Dishwasher safe top rack + free deep-clean brush included
  • BPA-free stainless steel
  • 13 colors

Protein residue doesn't stand a chance.

Add to Cart
Lifetime Warranty | Free Shipping Over $50 | 30-Day Returns

One cup that keeps up with the protocol - so you can think about literally anything else.

FAQ

The protein-and-hydration questions.

Does the protein side actually stay cold?

Yes - each chamber is independently vacuum-insulated. Your shake stays cold through a commute, a workday morning, or a workout. Running one side hot and one cold? Some temperature influence over hours is normal physics; for the cold-cold combo this routine uses, it's a non-issue.

How do I clean it after a protein shake?

Top-rack dishwasher safe, and every Splitflask ships with a long-handle brush for the chambers. No funk, no science experiments.

Is 15oz enough for my shake?

A standard scoop-and-water shake is 12-16oz. The chamber fits it with room to actually shake it.

Does it fit in a car cup holder?

Yes - the tapered base fits standard holders.

Can I put electrolyte powders in it?

Absolutely. Stainless steel, BPA-free, and the chambers rinse clean. Mix away.

Final sip

Protein in one hand. Hydration in the same hand.

One cup that keeps up with the protocol - so you can think about literally anything else.

Stay consistent →
Free Shipping Over $50
30-Day Returns
Lifetime Warranty

This is not a medical device or a substitute for professional medical advice. Splitflask is designed to support ordinary hydration and nutrition routines while you follow guidance from your clinician. Results and experiences may vary.

© 2026 Splitflask. All rights reserved. | Privacy Policy | Terms of Service | Refund Policy
Splitflask - protein and hydration in one hand. Stay consistent →