KNOB-ism: Grip it your way. Bottle, slim can, regular can or a pour - this KNOB can handle all 4 without losing its cool. It’s the 4-way you always wanted. One tumbler. Endless ways to get your hand on it. Product Description This is the ultimate in versatility. A tumbler that adapts to your beverage needs. Whether you are drinking from a bottle, a slim can, a regular can or a liquid beverage of your choice, this KNOB can handle it all. This KNOB is made of food-grade, 304 stainless steel with a double-walled, vacuum-sealed construction to keep your chosen beverage cool for hours of optimal enjoyment. Other features: Dual Lids: One for use with bottles or cans to form a tight gasket around them to seal in the cold. Second one for use as a liquid tumbler to seal in the beverage and flip open to drink from. Double-walled, stainless steel construction to keep your beverage cold for 4-6 hours. Powder-coated exterior for optimal handling and condensation-free holding. Built-in bottle opener on bottom of tumbler. Dishwasher safe (Lids and gaskets recommended on top rack). The KNOB: Grip It. Fill It. Savor It.