Insulin starts degrading above 25°C.
You can't see it happen.
No colour change. No warning. It just quietly loses potency — and most cases give you no way of knowing when that's happening.
The car
A parked car hits 40°C in minutes — even on a mild British day. Your pen is cooking in the glovebox.
The journey
Long-haul flights, beach days, winter-sun holidays. Hours away from a fridge, with medication that can't take the heat.
The guessing
“Is it still OK?” An unexplained high reading, a wasted pen — and you never know if the heat was to blame.
Most people find out the hard way. There's a simpler answer: see the temperature, at a glance.
Know. Don't guess.
Your insulin's temperature.
Always visible.
The built-in digital display reads the temperature inside the case, in real time, in °C. One glance — on the beach, in the airport queue, at your desk — and you know your medication is safe.
Underneath, triple-layer insulation and two reusable ice packs hold the cold for 6–8 hours. No batteries to charge, no refills to buy, nothing to plug in.
Freeze the packs overnight → pack your pens → check the number. That's the whole system.
See how it works →How it works
Three steps. Zero guesswork.
A routine that takes less time than making your morning tea.
Freeze
Pop the two ice packs in the freezer overnight. They're reusable indefinitely — nothing to buy again.
Pack
Slide your pens in — insulin, Mounjaro®, Wegovy®, Ozempic®. Up to 3 pens plus supplies fit inside.
Check
Glance at the display whenever you like. The number tells you your medication is safe — no guessing.
Choose your pack
One for every bag you carry — the more you add, the less each case costs.
2× Home & Travel Set
✓ 30-day money-back guarantee — no questions asked.
Every number, published.
of cooling from a single overnight freeze
real-time display accuracy, readable in full sun
insulation layers between your pens and the heat
money-back guarantee — try it risk-free
Free UK delivery
On every order
30-day money back
No questions asked
Secure payment
Visa, Mastercard, Apple Pay
Tracked shipping
Tracking number on every order
"Frostcase is for people who stopped guessing — and started knowing."