Review on Black Coasters Drinks Silicone Prevents by Deshaun Fisher

Excellent coasters that clean surfaces well from water. I like that they have grooves to collect water droplets. Other coasters I've had in the past (concrete, slate, etc.) tend to run down the sides and defeat the purpose. The indentation in them is a game changer because they collect any liquid. They are easy to wash and dishwasher safe whenever they need cleaning.