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Guides for life with refrigerated meds
From TSA security to Father's Day gifts — practical guides written with the diabetes and GLP-1 communities. What works, what to skip, what to say.
(Diabetes, GLP-1, peptides, HRT, fertility, biologics — and anything else that has to stay cold. Week-by-week walkthroughs for travel, work, school, and the moments that don't come with instructions.)
Carry-on, every time.
Three rules that apply on almost every airline.
Cabin only.
The cooler and its lithium battery travel in the cabin — never in checked baggage. This is standard for any lithium battery, on any airline.
Personal item allowance.
The cooler in its sling bag fits inside standard personal-item dimensions. It goes under the seat in front of you.
Declare at security.
Tell the screening officer it's a medical cooler with prescription medication inside. Carry your prescription documentation and the doctor's-note template below.
Country and region rules.
Tap a region for what to expect at security and what to say.
Medications and the devices that store them are exempt from the 3-1-1 liquids rule. Tell the officer at the bin you have medication; expect a brief swab test of the cooler or a visual inspection.
CATSA permits medically necessary liquids, gels, and medical devices in carry-on without volume restrictions. Declare the cooler at pre-board screening.
Insulin and other temperature-sensitive medications are exempt from the 100 ml liquids rule when accompanied by a prescription or doctor's letter.
Member-state rules vary slightly but all follow EU Regulation 2015/1998: medical liquids and devices are permitted in carry-on with proof of need.
Medical liquids and the coolers carrying them are screened separately and permitted in cabin. Have your prescription paperwork accessible.
Insulin and prescription cold-chain medications are permitted in cabin with a doctor's letter (Chinese or English).
If you're flying somewhere not listed, the safest rule is: cabin only, declare at security, carry a doctor's note.
Two Tips
Doctor's note template
A one-page letter from your prescriber. Hand it to a security officer if there are questions. It covers your name, your prescriber's name, the medications you carry, the cooler as the storage device, and the medical need to keep them in temperature range.
Lithium battery
The battery has specs printed on the wrapping. No need for other documents to prove anything.
Information here is provided as a courtesy and reflects standard practices at major airports as of May 2026. Airline and country rules change. Verify with your specific airline before each trip. ZKSCool does not provide legal or medical advice; consult your prescriber and the relevant airline or border authority for your itinerary.