Using your Tervis NFL Baltimore Ravens tumbler is a breeze. Just remove the BPA - free travel lid, pour in your favorite hot or cold drink, and put the lid back on. For best results, don't overfill the tumbler. When it comes to cleaning, you can either wash it by hand with some mild dish soap and warm water, or simply toss it in the dishwasher. It's also safe to use in the microwave for reheating and the freezer for chilling. However, make sure not to use it for extremely high - temperature or pressure - building liquids. Since it's made of impact - resistant material, it can handle a few bumps, but try not to drop it from a great height. With its Lifetime Guarantee, you can enjoy using this tumbler for years to come.