Puffin mug coaster Puffin and Abstract Sea mug coaster £4.29 Quantity: at £4.29 each Add To Basket 4 in stock. Puffin and Abstract Sea design mug coaster and drinks mat. Coasters measure 9cm square and are 4mm thick. Made from MDF with a cork back. Handprinted to order using the sublimation technique in my studio. FREE UK postage.