Quickly converts Thinkbaby Sippy Cup into the Thinkster! Designed to fit all Thinkbaby 9oz bottles.
- No spill spout - features our cross cut design.
- Extra soft, medical grade silicone, straw provides an easier transition from baby bottle feeding to Sippy Cups to our straw bottle - The Thinkster.
- Free of Bisphenol-A (BPA), phthalates, nitrosamines, lead, PVC, PET, and biologically harmful chemicals.
- Includes one Thinkster swivel top and straw.
- Perfect for 16 to 48 months
- Reduces environmental waste and pocketbook waste