Built-in cup holders with perforated bottom for easy cleaning. Well suited for 16 oz.+ cups. One piece molded construction. Constructed of 100 Percent prime synthetic resin, a material naturally impervious to salt air, chlorine, and most common food stains. Stays cool in the hot sun. Stacks for easy storage. Essential complement piece for beach, pool decks, and balconies with chairs or chaise lounges. Cleans easily with soap and water.