Grosmimi Straw Cup is the highest ranked toddler's cup made with PPSU on Amazon Description - This Grosmimi PPSU straw cup with the newest, dome shaped flip-top lid (One Touch Cap), has a lock feature, and is much easier for the baby to use with one hand. Stage 1 Straw kit, and Weighted Straw are also included - Highly Functional: Grosmimi bottles are made of PPSU, a FDA compliant material commonly used for medical devices requiring repeated steam sterilization. It is incredibly durable, high temperature resistant (-4°F to 392°F) and BPA Free - Leak-Free: ‘+ CUT’ prevents any leak from the bottle, 2-way of using allows baby to drink no matter sitting down (with the tube) or lying down (without the tube) - Easy to Clean: It is so easy to separate all the parts for hygienic cleaning and reassemble them in a few seconds - The PPSU straw cup is suited for 6 Month+ - The weighted straw can be replaced with Grosmimi Replacement Straw kit stage 2 for babies over 12 months