Complete Gift for the Student or professional.
Icy therapy: Place in Freezer
Heat therapy: Microwave them (submerged completely in water) in the convenient Kewler Krock.
1 Mega Thermalball
2 small Thermalballs
1 Large Thermalball Sack
Kewler Krock - made by miracle ware
If you microwave the balls using the icysack, you MUST remove the clasp!