Strong MDF Wood - The coaster upper layer is a glossy printed image, the middle layer is MDF wood, with a natural cork base to protect your dining table or office desk. Cork Base - The base layer of the coaster is cork to prevent tables from being scratched and damaged. Perfect Size - The coaster diameter is 9cm, suitable for all types of drinking glasses like bourbon, highball, lowball, whisky glasses and mugs, tumblers, flasks, shot glasses etc making them excellent for your home bar or kitchen table. Easy To Clean - Spills can be easily wiped off with a damp cloth and should not stain if removed swiftly. Use warm water and a mild washing up liquid detergent or antibacterial spray. Ideal Gifts - The glossy print on the surface of the coaster keeps the pattern bright, perfect to decorate your kitchen, living room, bedroom or office and so on. Perfect to sent to friends and work colleagues as a gift.