Just stretch the silicone skin over and clip in the insert you need.
Fits mugs, sports shakers, regular cups, and more.
Grows with your baby from 0 months to 5 years.
Fits most other brand wide neck nipples.
Included sippy and straw spouts are non spills.
Weighted straw follows liquid, allowing the toddler to drink from any angle
1 x blue sleeve
1 x green sleeve
1 x sippy cup insert
1 x straw cup insert with weighted ball and straw
1 x straw cleaning brush.