Powder coating. Can be used with optional slide lid LTM12L. Max engraving area without a rotary attachment is 1 1/2"(L) x 4"(H). The Polar Camel logo is on the top of the clear lid. Not recommended for dishwashers, hand wash only. Seamless construction so there is no leak point. Hole on lid is big enough for a straw. The stainless steel band at the top without coating is approximately 3/8"(H). Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade.