SPOUT : It comes with spout and weighted kit. Soft silicone spout is gentle, flexible and sippable. It is also made of silicon for feeding bottle nipples. Babies will be easy to use it without rejection. FEED IN ANY POSITION : Let baby drink while holding the cup at any angle with weighted kit. The weighted ball will follow the contents while baby is moving. SOLID TYPE : The ball of weighted kit is made in a monolithic form which is easy to wash and hygienic 6 oz &10 oz : It can be use with 6 oz &10 oz Grosmimi cups or bottles. COMPATIBLE : It can be use with other brand wide-neck feeding bottles. Spout with weighted kit. Weighted nipple kit is good for babies that start baby food early with a lot of movement. You can feed both sitting and lying down. The weighted ball will follow the baby's movements. Soft silicone spout is gentle, flexible and sippable. It is also made of silicon for feeding bottle nipples. Babies will be easy to use it without rejection.