Simply microwave for warm therapy or freeze for cold therapy, Double Safety Tested: CPSIA, FDA, and TRA (Toxicological Risk Assessment) . Safety reports for Pearl beads are available upon request. Reusable and easily cleaned with mild soap and water. Complete care and instructions printed on item . Complies with CPSIA, FDA, Prop 65. 0.75" H x 4.25" Diameter. Price includes a 1 Colour Imprint. Imprint area is 2.0" W x 1.125" H on Front. Call for multi-colour or multi-location imprints or for rush delivery availability.