NWT Pet free, Smoke free home This package includes 3 twist-on Sippy Tops with Straws, each with a leak-proof cap for use with Kiinde Twist Pouches, and brush for cleaning. Once your little one has graduated from nipples, use these Sippy Tops (with optional included straw attachments) to feed breast milk, formula, water, juice, or milk from Kiinde Twist Pouches to them. Soft silicone valves prevent leakage and allow flow only when your little one is sucking (not when the pouches are in your bag or on your floor). Sippy Tops twist-lock tightly onto Twist Pouches, so even the strongest little ones won't be able to pull off these caps. Ease transition from bottles; Soft silicone feels similar to a bottle nipple; Allows for faster and more independent feeding; Transition from bottle nipples ensures healthy teeth and gums Leak proof; One piece lid with twist on cap for extra security; Compact and convenient; Great for travel Easy to clean; BPA, PVC and phthalate free; Top rack dishwasher safe and steam sterilizer safe; Recyclable Designed for use with the Kiinde Twist Breast Milk Feeding System; Collect, store, prepare and feed using a single disposable breastmilk storage bag; Prevents spills and reduces dirty dishes