The Klean Kanteen Vacuum Insulated Growler 32oz bottle was designed with high-performance and will keep beverages at their tap-fresh temperature for hours on end. The Insulated Growler 32oz will keep drinks cold for 30 hours and iced for 80 hours. Long enough to fill up at the tap and drink the next day, still cold, fresh and delicious. Crafted of high quality food grade 18/8 stainless steel, food grade silicone with laser engraved logo. Wide 1.75 inch (44mm) opening fits ice, is easy to fill, pour, drink from and is fitted with the Swing Lok Cap. The Swing Lok Cap is removable, stainless steel, easy to open with one hand, creates an all stainless steel interior and threadless for a tight, leakproof seal. Electropolished interior and rounded corners make the Vacuum Insulated Growler 32oz bottle easy to clean and maintain. All Klean Kanteen products are made using safe healthy materials and backed by the Strong as Steel Guarantee. Hand washing recommended.