LEAK PROOF SIPPY CUP: Enjoy a mess-free experience with this sippy cup for babies. We designed our toddler cups with a patented backflow prevention disk made of ​​polypropylene with rubber edges. This technology minimizes spillage and is completely leak proof, even with pressure from warm liquids. CUSTOMIZABLE BOTTLE: Make our sippy cups into baby bottles by easily removing the anti-leak disk and straw. Our versatile cup can be used by infants beginning at 6 months but can be used as a sippy cup for 1+ year old babies, which makes it ideal for little ones transitioning from baby bottle to cup without the need to purchase a separate product. ROTATING HANDLE DESIGN: With 360-degree rotating handles, this toddler cup is more comfortable on your baby’s wrists compared to an average toddler water bottle. No matter what position your baby is in, the rotating handles make this cup easy for them to hold. QUALITY FLEXIBLE STRAW: This sippy cup comes with a flexible straw that your baby can learn to drink out of easily when switching to a big kid cup. Our patented backflow prevention disk is compatible with both versions of our straw, so our straws and cup can provide optimum comfort to your toddler when drinking. CHILD-SAFE PPSU MATERIALS: Feel safe and secure with toddler straw cups made from BPA-free materials. Unlike kids cups that are made of regular plastic, our PPSU materials are temperature resistant and have similar benefits to glass, like not absorbing the color and smell of juice, milk, or whatever your baby wants to drink. Is your baby ready to switch from their baby bottle to a sippy cup? Make the transition easier with our sippy cups from UBMOM. From the straw to the lid, this sippy cup is designed to make your baby comfortable. Take out the backflow prevention disk and the straw inside the bottle to transform this toddler cup into a baby bottle. This sippy cup with straw is designed with rotating 360-degree handles to help your baby hold the cup in any position. Made of quality PPSU materials, this sippy cup is kid-safe, BPA-free, and has no odor. Choose your favorite color, and pick between two size options.