ZKSCool CB04 Peptide & Insulin Mini Fridge — 793 ml, widest chamber
Disclaimer: This is only a cooling case/cooler accessory. Insulin, syringes,
medications and other medical supplies are not included. This device is a
temperature‑storage container, not medical equipment.
A vial lying on its side rolls, and the label ends up facing away. At 6am that means picking one up, turning it over, putting it back. CB04 is 42 mm deep inside — enough for small vials to stand upright, so the AM and the PM stay exactly where you left them. Open it, see the whole protocol at a glance, take the right one, close it.
It holds anywhere from 2 °C to 20 °C on the dial, with the live temperature on the LCD. Cold for what has to be refrigerated, cool for what must never be. Two 13,600 mAh batteries come in the box, and it is the only model in the range that also runs from USB — so a power bank or a seat-back socket keeps it going.
CE Certified | FCC Certified | RoHS Certified | TSA Compliant for travel. Cold-chain engineering since 2015.
We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
1-year standard warranty included with every purchase. A 2-year warranty extension is also available — request it through our warranty form on the FAQ page for added peace of mind.
| Model | ZKS-Cooler-CB04 |
| Net weight | 5.07 lb |
| Capacity | 27fl oz |
| Temperature range | 2–20 °C (36–68 °F) |
| Battery capacity | 13600mAh x 2 |
| Adapter input | AC100V~240V ; DC12/24V |
| Internal Dimensions | 185 x 102 x 42mm |
| Product Dimension | 155 x 246 x 135 mm |
| Built in battery voltage | 5V |
Forty-two millimetres of internal depth is what separates a cooler you pack from a fridge you live with.
Interior is 185 × 102 × 42 mm. The depth is the point — small vials stand rather than roll, so the labels face you and nothing gets picked up twice.
2–20 °C on the dial with the number on screen the whole time. A cooler with one fixed cold setting can only ever do half the job.
13,600 mAh each, 5–8 hours apiece. CB01 and CB02 have no USB — CB04 is the only one that runs from a power bank or a seat-back socket.
About 12 insulin pens, or 7 larger biologic auto-injectors — the format most coolers cannot take.
73 °F down to 38 °F, then it holds there. You set the number; it keeps it without you watching.
5 Numbers
*This product is designed to provide portable temperature-controlled storage under the test conditions stated on this page. Actual performance may vary with ambient temperature, load, use and power conditions. Always follow your medication label, manufacturer instructions and advice from a healthcare professional.
Three steps. Then forget about it.
Wall adapter, USB, or run on the included 2 batteries. The cooler reaches its setpoint in 14 minutes.
One touch of the auto button. Lock the controls with a 3-second long-press so a bag jostle doesn't change your setting.
A secure and reliable cooler anywhere you are. Make sure there is enough room for ventilation to ensure proper cooling.
*Performance varies with ambient temperature, load and power conditions. Always follow your medication label and the advice of a healthcare professional.
Everything you need to start cooling on day one.
What it's built to hold.
Internal usable space accommodates standard injectors. Confirm fit against your specific medication on the full compatibility list.
Lantus · Tresiba · Toujeo · Levemir · NovoLog · Humalog · Apidra · Fiasp.
Approximate count: 6-9 injection pens.
Ozempic · Wegovy · Mounjaro · Zepbound · Trulicity · Saxenda · Victoza.
Most weekly injector pens fit upright; some users carry one or two at a time.
Semaglutide, Tirzepatide, Tesamorelin and other temperature sensitive medications.
Pen and injector dimensions vary by manufacturer and lot. Drug brand names are listed for compatibility reference only and do not imply endorsement. Always follow your prescribing information and consult your pharmacist.
If we missed yours, send us a note.
It cools between 32–46.4°F (0–8°C), keeping insulin in the safe storage range.
It fits 6–9 insulin pens, 25 vials, or up to 60 refills.
Each of the two included 13,600mAh batteries provides 6–10 hours of cooling per charge. A full recharge takes about 7 hours.
It supports 110V–240V wall adapters, USB cables, car chargers, and portable power banks — very flexible for travel.
Yes, it is TSA-compliant, making it suitable for air travel.
No — no ice packs needed. It uses thermoelectric cooling powered by battery or plug-in power.
Thermoelectric coolers work best in moderate temperatures. In very hot conditions (above ~85°F), cooling efficiency may be reduced. Keep it out of direct sunlight or a hot parked car.
Some users have noted the display shows Celsius only, which may require a mental conversion for US users.
6.1 x 9.7 x 5.3 inches (155 x 246 x 135 mm), weighing about 5 lbs.