These honey-comb pads are made of high end-silicone, intermixed with food grade pigment and stabilizer, treated with precision temperature control and processing time. It makes the product very stable, not easy deteriorate nor discolor. It can withstand harsh weather and very suitable for outdoor usage. When its dirty, you can clean it by hand-wash or toss it into the dishwasher. Can easily & conveniently accommodate most sizes of cups, tumblers, drinking glasses, coffee mugs & teacups. They can be used as home decor, spoon rest, bar ware set bartender supplies or table pad.