Transforms your baby bottle into a sippy cup. Compatible with 5 oz and 8 oz bottles and Mason jars (regular mouth). BOTTLE NOT INCLUDED. Note: It only fits 7 cm bottle replacement nipples. Easy transition since you are already familiar with the bottle. Soft spout for an easy transition. Made of silicone. Does not contain , phthalates, PVC, latex or lead. Easy to clean. Additional washing part. Color: transparent color Material: silicone Size: bottom diameter 7cm Package Contents: 6 x Sippy Spout Nipples Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.