TK Closure internal thread design increases thermal performance and compatible with TKWide caps Climate Lock keeps contents hot up to 17 hours or iced up to 58 hours Chip-resistant Klean Coat powder coat finish (Brushed Stainless has no coating) BPA Free 18/8 food grade stainless steel won't retain or impart flavors Slim design fits in most cup holders; includes leak proof Café Cap with Wing Away Loop The Insulated TKWide is the best stainless steel coffee mug solution for hot coffee, hot tea or your favorite iced drinks. Leak proof Cafe Cap 2.0 is easy to drink from, clean and keeps liquids contained. Climate Lock double-wall vacuum insulation keeps drinks hot for 10 hours and iced for 30 hours! Klean Coat powder coat finish is 4X more durable, chip-resistant and safe for people and planet.