Double-wall copper vacuum insulated stainless steel maintains temperature, is sweat-proof, and provides durability in small, but mighty hands. No tip drinking, simply flip open Bite Valve & Sip. Wide mouth opening for easy cleaning and filling. BPA free. Cap dishwasher safe. Hand wash stainless steel vessel. Recommended for ages 3+. Exclusive. Laser engraving silver Drinkware will result in a subtle, tone on tone decoration. Recommended to hand wash only.