Using your Hydro Flask 12 oz. Slim Cooler Cup is a breeze. First, you can either place a 12 oz slim can or pour your favorite beverage into the cup. The TempShield® insulation will keep it at the right temperature for hours. For stability, put the flexible collar on the bottom of the cup. When it comes to cupholders, most of them can easily fit this cup. Cleaning is simple too - it's dishwasher safe. Just make sure to keep it away from sharp objects to avoid scratching the Color Last™ powder coat. Also, since it's BPA - Free and Toxin - Free, you don't have to worry about any harmful substances. Enjoy your drink with this great cup!