Thermos Nine Cube Ice Mat (Reusable) $1.09 free shipping with Prime (FSSS)
9 cube mat measures 5.5 by 8"
Cube mat is food safe, reusable and durable
Each cube contains clear, non-staining purified water
Silver reflective backing provides an extra layer of insulation to increase
cold retention
Store in your freezer until ready to use: mat remains flexible when frozen
Thermos Nine Cube Ice Mat: http://www.amazon.com/Thermos-Ice-Mat-9-Cube/dp/B001TWI81G/ref=