Hydro Flask 28 oz All Around Tumbler w/Straw Lid Cascade. The splash-resistant flexible Press-In Straw Lid keeps your favorite drink at the ready and easy to sip. These insulated tumblers are incredibly comfy to hold and are easy to fill sip and go. Specifications for Hydro Flask 28 oz All Around Tumbler w/Straw Lid: Manufacturer: Hydro Flask Volume: 28 oz Fabric/Material: 18/8 Pro-Grade Stainless Steel Height: 10.75 in Width: 4 in Weight: 0.85 lb Package Contents: Hydro Flask 28 oz All Around Tumbler w/Straw Lid Hydro Flask T28PS482: 28 oz All Around Tumbler w/Straw Lid Cascade