100%Silicone 【First Stage Infant Drinking Cups】 Moonkie First Stage Infant Drinking Cup (4 oz) is the ideal transition for your little ones to wean from the bottle. Our set is designed to encourage a smooth transition to independent drinking, from a sippy cup to an open cup. The American Dental Association recommends weaning from the bottle by age one to prevent tooth decay. Choose Moonkie for a successful transition from bottle to cup. 【Soft & Reliable Food Grade Silicone】 Our baby straw cup are made from 100% food-grade silicone and are free of BPA, PVC, Phthalates, and any other heavy metals. The Soft silicone spout and straw are gentle on developing teeth and gums - but sturdy enough for any little teether! That means Moonkie sippy cup are ideal for babies learning to drink by themselves. 【Three-in-one Design (with the straw + the spout + open cup)】 Our baby cup features a versatile three-in-one design that can be converted from a sippy cup to a straw cup to an open cup, encouraging your baby to develop drinking skills.The open cup promotes lip closure, speech development, and safe swallowing while also preventing tooth decay. Going from a straw to independent drinking is such a huge milestone for early development, so we have designed one cup that will be there for every step. 【Leak Proof & Spill Proof】 No more worries about spills from your little one's playful hands! Our baby cups are equipped with a double-seal structure that keeps the lid securely closed, even if dropped. The spout and straw have a built-in valve to prevent liquid splashes. Feel confident and at ease while your baby explores, knowing that our straw sippy cup can handle their roughest playing or cranky fussing. 【Dishwasher Safe for Easy Cleaning】 Toss your toddler cups in the dishwasher for a quick clean or boil them on the stove for an even deeper clean – Moonkie cups are 100% dishwasher safe and boil-proof for quick and easy cleanup! These cups are designed for baby's health and momma's convenience! Moonkie 4M+ Transition Training Cup— A seamless and versatile solution for your baby's transition from bottle to drinking cup. Recommended by child experts, this sippy cup promotes healthy oral development and independence in drinking. With a spout cup and straw cup included, it caters to different learning preferences. Featuring a leak-proof design and easy-to-clean components, our sippy cup offers convenience and peace of mind. Experience the perfect aid for your baby's milestones and enjoy a hassle-free transition.