mySimple Products Custom & Cool {3.5" Inches} Set Pack of 6 Round &ldquo;Flat & Smooth Texture&rdquo; Drink Cup Coasters Made of Stone w/Felt Bottom & Natural Stone Classy Marble Design [Colorful Gray & White] USES: Keep surfaces in your household safe from stains, dripping and condensation. Use a coaster for any and all beverages. ALTERNATIVE USES FOR COASTERS: Coasters without sharp edges can be used as toys for toddlers at the parents discretion, stacking toys for children, great for protecting the shelves in your fridge, glass and stone coasters are great for hot pots and pans, balancing tables and chair legs, decoration, coasters with "lipped" edges can be used as soap dishes, and much more! WARRANTY: This product comes with a lifetime warranty that is guaranteed by the manufacturer. MATERIAL: This product is made of only the best materials available to the manufacturer. CLEANING & WASHING: You should never wash a coaster using a dishwasher. may occasionally need cleaning. If you need to clean your coaster, rinse in cool, clear water and air-dry