evo.com | Hydro Flask Drinkware > The Hydro Flask 12oz Slim Cooler Cup doubles as a can or bottle cooler and a 12 oz beverage cup. Whether you're sipping sparkling water or chugging hot cocoa by the fire, Hydro looks good and keeps everything at the temperature it should be. 18/8 Pro Grade Stainless Steel Won't retain or transfer flavor. Dual-Use Design Works as a Can or Bottle Cooler and a 12oz Beverage Cup Diameter 2.9" TempShield(TM) Insulation Hydro Flask's technology eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours. Sleeve Cover | Hydro Flask 12oz Slim Cooler Cup 2024 in Black