I just use a 12 pack cooler half-filled with ice. I keep it in the bathroom. After each visit to the bathroom I put it back into the ice and cover it with a folded heavy towel. It is out of the way and the ice doesn't melt that much. It stays very cold
It's about that time folks!!! My 24 hour urine collecting starts on the 31st. Kt/V again. Let's hope I'm consistent with the 2.4 like I was last time.