Bottle is impact and shatter resistant, BPA free, and meets FDA requirements. Bottle is hand wash only. Flip straw lid. Wide mouth opening. Silicone band color matches color of cooling towel. Cooling towel inside base, made of soft Polyester material. Wet towel thoroughly with cold water. Wring out a little of the excess water. Shake towel to activate cooling effect. Wrap towel around your neck or place on top of your head to experience the cooling effect. Towels are machine washable in cold water, even if imprinted.