Leak-Free Design with Patented Backflow Prevention UBMOM's patented Backflow Prevention Disk ensures zero backflow - even when shaken or turned upside down. This exclusive technology completely stops leaks and prevents spills, keeping your baby and your bag mess-free. Convertible Feeding Solution Transform our Signature PPSU Straw Cup into a baby feeding bottle using UBMOM's compatible bottle nipples. One product, mulitple uses - Sippy Cup ↔ Feeding Bottle with ease. 360 degrees Rotary Handle for Safety The ergonomic handle roatetes 360 degrees to protect your baby's wrist. Designed with impact-absorbing flexibility, it minimizes wrist strain and reduces shock if your baby falls while holding the cup. Premium Materials Crafted from high-quality PPSU for durability and heat resistance. BPA-free and safe for everyday use. *Leak-Free Design with Patented Backflow Prevention UBMOM's patented Backflow Prevention Disk ensures zero backflow - even when shaken or turned upside down. This exclusive technology completely stops leaks and prevents spills, keeping your baby and your bag mess-free. *Convertible Feeding Solution Transform our Signature PPSU Straw Cup into a baby feeding bottle using UBMOM's compatible bottle nipples. One product, mulitple uses - Sippy Cup ↔ Feeding Bottle with ease. *360 degrees Rotary Handle for Safety The ergonomic handle roatetes 360 degrees to protect your baby's wrist. Designed with impact-absorbing flexibility, it minimizes wrist strain and reduces shock if your baby falls while holding the cup. *Premium Materials Crafted from high-quality PPSU for durability and heat resistance. BPA-free and safe for everyday use.