The Klean Kanteen Vacuum Insulated Growler 32oz bottle was designed with high-performance and will keep beverages at their tap-fresh temperature for hourson end. The Insulated Growler 32oz will keep drinks cold for 30 hours and icedfor 80 hours. Long enough to fill up at the tap and drink the next day, stillcold, fresh and delicious. Crafted of high quality food grade 18/8 stainlesssteel, 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 theSwing Lok Cap. The Swing Lok Cap is removable, stainless steel, easy to openwith one hand, creates an all stainless steel interior and threadless for atight, leakproof seal. Electropolished interior and rounded corners make theVacuum Insulated Growler 32oz bottle easy to clean and maintain. All KleanKanteen products are made using safe healthy materials and backed by theStrong as Steel Guarantee. Hand washing recommended.