17 x 17 x 17 cm, 3+ The inflatable cup holder is suitable for both bottles and glasses of drinks and you can use the inflatable cup holders as summer accessories for a party or when you are relaxing at your pool. The Swim Essentials... 17 x 17 x 17 cm, 3+ The inflatable cup holder is suitable for both bottles and glasses of drinks and you can use the inflatable cup holders as summer accessories for a party or when you are relaxing at your pool. The Swim Essentials inflatable cup holder has a hole in the center that molds to your glass or bottle. This ensures that your drink is stable and your drink will not fall over quickly. The Swim Essentials inflatable cup holders are the best summer accessories for the pool or on the beach!