BabyBuddha Expression Cups 24mm/22mm.The BabyBuddha Express Cups were designed for comfort and fit. Each lightweight cup weighs only 4 oz. The breast shield is made of soft touch silicone, providing comfort against the skin while pumping. The cups come with snap on lids for easy storage in the fridge. Each 8 oz. cup is also marked with graduations to show how much milk has been expressed. The Express Cups are available in two flange sizes of 24/22mm and 28/26mm with three additional insert sizes of 17mm, 19mm and 21mm for optimum fit. When paired with the BabyBuddha Breast Pump, you can still achieve hospital grade strength. By combining the performance of your favorite pump with the convenience of a wearable collection cup, BabyBuddha offers you the ultimate hands-free pumping experience. Includes:- Two (2) Express Cups.- Two (2) Silicone Diaphragms.- Two (2) Inserts.- Two (2) Duckbill Valves.- Two (2) Silicone Flanges.- Two (2) Cup Covers.