Make it a picnic or keep things cool at the tailgate or big game when you stock up on these reusable ice blocks from Igloo(R) brand. This small-sized 4.25" x 5.25" x 0.75" plastic freezer block has a thin and stackable design with a permanent stopper and is filled Ultratherm(R) gel -- a non-toxic and reusable formula to keep fresh and prepared foods and drinks refreshingly cold. Great for coolers from lunchbox to team-sized! Hand wash with soap and water. Sold unimprinted.