Pura Is The First And Only Juvenile Bottle Provider To Ship Its Bottles With A 100% Plastic-Free Silicone Travel Nipple/Spout Travel Cover. This Revolutionary Design Not Only Eliminates Plastic Components But Provides Much Improved Functionality As It Does Not "Pop" Off The Bottle When Jostled About In A Bag. Also In Accordance With Re-Purposing Philosophy, The Travel Cover Can Also Be Used As A Plastic-Free Snack Cup For Toddlers In A Stroller, Pram Or Car Seat! Covers & Protects The Nipple Of Spout While On The Go Secure Fit Prevents Leaking Design Is Secure Even When Jostled About Tinted Opaque Blue 100% Plastic-Free