Built Double Walled Stainless Steel Tumbler 5193240, Mint. The double-wall construction ensures both hot or cold drinks can be kept at optimum temperature for longer. It can keep your drinks cold for 24+ hours or hot for 8 hours. Threadless, transparent Tritan lid easily slides open and closed for a one handed operation and helps to prevent against spills. Hand Wash Recommended for body and lid, the Tritan lid separates into two parts making it super easy to clean.