Custom Timelord Themed Tumbler - Powder Coated This 20 oz skinny tumbler features a double-will vacuum insulation with a clear lid. It is 2X heat & cold resistant compared to normal tumblers. Polar Camel tumblers are made from 18/8 gauge stainless steel - also known as Type 304 Food Grade. If you are interested in a custom engraving design, please contact me for price. We proudly engrave and ship all of our engraved goodies from our shop in Florida! • BPA and Lead Free • Hand Wash Only • Do Not Microwave