ZKSCool

Your medication stays in range. Everywhere you go.

11 years cold-chain engineering 60+ countries TSA Compliant Built by the team that supplies hospitals FCC + CE

Medication lives between 2–20 °C (36–68 °F). The world doesn't.

Ice melts.

Gel packs and Frio pouches drift out of range hours before you notice.

Cars get hot.

A car in summer can hit 60 °C. Most carriers can't keep up.

Hotel fridges fail.

Mini-bars freeze pens or run warm. There's no way to know without a thermometer.

Made by people who supply hospitals.

We've been engineering cold-chain instrumentation since 2015 — temperature monitoring used in hospitals, blood centers, CDCs, and pharmaceutical operations across 60+ countries. We took the same engineering team and the same precision standards, and built the smallest cooler we've ever made. For one person. For one day. For one bag.

CB02 Insulin Cooler Travel Case

Travel Lite.

The trip is long, the destination is warm, and everything has to come with you. CB02 is built for serious travelers who need reliable temperature control for their medications.

International travel ready

TSA compliant design for stress-free airport security

Fits Mounjaro & tall vials

Specifically designed for GLP-1 medications and extended pens

Portable insulin cooler

Precise temperature control wherever you go

Capacity

8-12 pens

Battery Runtime

8+ hours

Weight

2.2 lbs

TSA Compliant

Fits Mounjaro

Travel Ready

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CB04 Mini Peptide Fridge

Organized peptide storage for your vials

The CB04 is a popular choice for peptide storage, with a depth that keeps vials standing upright and organized. Engineered precision cooling ensures precise temperature control for your temperature-sensitive medications.

Vertical vial storage keeps peptides organized

Upright design prevents rolling and damage

Precise temperature control and monitoring

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Clear product specifications

Every model lists its temperature range, tested runtime and the conditions those results were measured under.

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Support before and after purchase

Email and phone support, 24 hours a day, 7 days a week. We reply within one business day.

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Shipping, returns and warranty explained

1–3 day processing, 30-day returns and a 12-month warranty — all written out in plain language.

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2–20 °C, under your control anytime

(35.6°F to 68.0°F) We were the first to put a 12 V semiconductor cooling chip into a unit this small. It pulls down 45% faster than the 5 V chips you'll find in cheaper coolers — and holds spec instead of drifting once the sun comes up. An aviation-grade aluminum liner and a third-generation dual-ball-bearing fan keep the cabin steady at ~18 dB. Quiet enough for a hotel room. Strong enough for a 35 °C car.

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Bestseller

ZKSCool is committed to enhancing the care of individuals with temperature-sensitive medical needs. Our mission centers on providing reliable solutions for the safe storage of crucial medications.

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Our precision coolers safeguard your vital medications with innovative technology no matter where you are

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Why not just an ice pack?

Ice packs / gel coolers

Cool fast, then drift. No way to know when they crossed 8 °C. Re-freeze required.

Evaporative Pouches

Need water. Don't reach 2–8 °C in hot, humid climates. No alarm if they fail.

Hard Coolers

Built for beer, not biologics. No temperature read. Too big for a personal bag.

Active 12 V cooling. Held in 2–8 °C. Rechargable batteries with car and home charger.

Read our comparison table

Questions worth answering.

The six things people ask us most. Everything else is on the full FAQ page.

Internal usable space accommodates standard insulin pens. Customers regularly carry Lantus, Tresiba, NovoLog, Humalog, Ozempic, Wegovy, and Mounjaro without modification. Approximate count and confirmed-fit list is on the product page.
Up to 8 hours of cooling on a full charge, depending on ambient temperature and how often you open the lid. Plug into the 12 V car USB or a wall adapter for unlimited runtime, and carry a spare swappable battery for long-haul flights.
Yes. The cooler is sized to fit cabin carry-on personal-item dimensions, and the lithium battery is within IATA carry-on limits. Personal medical devices and the medications they hold are generally permitted in the cabin under FAA, EASA, and CAAC rules — declare it at security and carry your prescription. The travel guide has country-by-country notes and a downloadable doctor's-note template.
No. The lower bound is 2 °C and the unit alarms on both high and low excursions. Set your low-temp alert at 2 °C and you'll know before your medication is at risk — the cooler beeps, the LED turns red, and your phone gets a Bluetooth alert.
No. Customers store GLP-1 injectors (Ozempic, Wegovy, Mounjaro, Zepbound), biologics (Humira, Enbrel, Stelara), growth hormone, fertility medications, and breast milk on the go. Anything that needs to stay between 2 °C and 20 °C will work.
1 year on the cooling chip, battery, and electronics. Returns within 30 days, no questions asked. Real human support, not a chatbot — reachable through Support.

Trademark Notice: NovoPen®, FlexPen®, and Novo Nordisk® are registered trademarks of Novo Nordisk A/S. Ozempic® and Wegovy® are trademarks of Novo Nordisk A/S. Mounjaro® and Zepbound® are trademarks of Eli Lilly and Company.

ZKSCool is an independent manufacturer of storage and transport accessories for temperature-sensitive products and is not affiliated with, endorsed by, sponsored by, or partnered with Novo Nordisk A/S, Eli Lilly and Company, or any pharmaceutical manufacturer.