Klean Kanteen Single Wall Stainless Steel Growler with Leak Proof Stainless Steel Swing Lok Cap Durable and High Quality Food Grade 18/8 Stainless Steel Construction Comes with Stainless Steel Swing Lok Cap Large 1.75 inch (44 millimeter) opening fits ice, easy to fill and pour; Compatible with all Klean Kanteen Classic caps Easy to clean electropolished interior doesn't retain or impart flavors Backed by the Klean Kanteen Strong as Steel Guarantee