Durable Tritan plastic bottle. Flip top 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, Shake Towel To Activate The Cooling Effect. Towels are machine washable in cold water, even if imprinted. Symbol Meanings 1. Cold water machine washing, under 30 degrees 2. Tumble dry on low temperature 3. Do not bleach 4. Do not iron.