I use Medtronic so, my supplies consist of sensors, infusion sets, reservoirs, adhesive strips, transmitter charger, serter, blood meter and tests strips, insulin vial, syringes for backup, and alcohol wipes. I wouldn’t refrigerate any of those items unless it was very warm. Like if it’s over 75 degrees. I wouldn’t leave mine in a hot car. If I go out on the beach and it’s very hot, I’d place in a cooler. I’m the most careful with the sensors. You can read your manual to see their recommendations.