Hydro Flask 12oz Slim Cooler Cup12 OZ – Green Hydro Flask 12oz Slim Cooler Cup – in stock now. The Hydro Flask 12Oz Slim Cooler Cup is a can cooler for hot days in the sun with your friends. Designed specifically for Slim cans, slip your favorite into the cooler and lock it in with the flexible collar. The Insulation will keep it cool or hot, depends on the temperature of the Item when you put it inside. Most prefer chilly. If you don’t have any Slim cans nearby, you can still utilize it as a cup, just remove the collar, fill with liquid, and drink away. Products on Sale Are Discontinued Styles or Colors. Features of the Hydro Flask 12oz Slim Cooler Cup Tempshield double-wall vacuum Insulation Multi-use design Cup holder compatible Flex collar Dishwasher safe 18/8 Pro-grade stainless steel BPA-free Color last powder coat Lifetime Warranty.