Slid the smaller size right into my lunchbox and it stayed cold until my 2pm break, even with the bag sitting in a warm car. Nice that they made two sizes so it doesn't rattle around next to a sandwich.
William★★★★★
Froze one of these overnight and it was still solid at lunch, keeping my yogurt and grapes properly cold. The slim shape slid right in without crowding out my sandwich container.
Jason R.★★★★★
Froze it overnight and my salad was still crisp by lunch the next day, which never happened with my old gel pack. It slides right into the lunchbox slot without taking up food space, and the two sizes mean I can grab the smaller one for a quick snack run.