These tumblers are really cute but they are also functional. They keep drinks really cold and will also keep hot beverages warm for hours. The tumblers are great for taking to the beach and using around the pool where having glass could be a danger. These tumblers are tough and durable. They have a smooth finish so they could be personalized with a vinyl decal if desired and they feel nice in the hand. The set comes with 2 tumblers, 2 lids with a sliding lock closure and a silicone seal, 2 extra replacement silicone seals, 2 stainless steel straws and a straw cleaning brush. These would also make a perfect gift for newlyweds, house warmings or hostess gifts for summer parties.