When we introduced the Thinkbaby over 7 years ago 95% of the baby bottles on the market were made of polycarbonate which contains BPA. Initially, we attempted to convince the major companies to move off of polycarbonate, but after being unsuccessful we launched Thinkbaby and Thinksport to address the concern of chemicals leaching from consumer products. We started with the baby bottle because polycarbonate was ubiquitous across the industry. As little ones systems are still in a state of development they have very little defense against foreign chemicals therefore, all of our bottles are free of - Bisphenol-A (BPA), phthalates, nitrosamines, lead, PVC, PET, and biologically harmful chemicals. Most of the Sippy cups on the market have hard plastic spouts or rubber spouts. We built the thinkbaby Sippy Cups with soft silicone spouts. This makes for easy transition from baby bottles to Sippy cups. This is a struggle that most parents face in moving to the next stage of feeding. with the thinkbaby Sippy Cup, the little one is already used to the feeling of silicone so making the transition is quite simple.To be used with limestone thermal sleeves. Available in orange, green, blue and pink. Comes with Travel Top reduces chance of spillage during travel and protects the nipple from coming into contact with foreign substances. Extra soft, medical grade silicone, spout provides easier transition from baby bottle feeding to Sippy Cups. We have won multiple awards based on the ease of transition of our line. No spill spout - features our cross cut design. Free of - Bisphenol-A (BPA), phthalates, nitrosamines, lead, PVC, PET, and biologically harmful chemicals. Comes with a travel top that protects the nipple from foreign substances and reduces spillage. Made from 304 (18/8) medical grade stainless steel. Extra soft, medical grade silicone spout provides easy transition from bottle feeding. No-spill spout features cross-cut design that mimics breastfeeding. Free of BPA, lead, PVC, nitrosamines, phthalates, PET and biologically harmful chemicals.