PPSU is short for polyphenylsulfone, which is the highest performing thermoplastic that gives better durability and heat tolerance than PP and PES. PPSU is transparent, high heat resistant and with excellent hydrolysis stability. PPSU stands up to repeated sterilization and prevents odor or color absorption. It is naturally BPA free, it’s a safer and better material for baby feeding bottles. Despite its supreme durability, it is advisable to change your PPSU bottles yearly.
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Why choose straw cups over other cups
Many parents first turn to a sippy cup because of their convenience (fewer spills and easy to carry along), but whether they have a hard or soft spout, sippy cups don’t offer much in the way of oral skills development. Just like with a bottle, baby places her tongue at the front of her mouth to form a seal and suckle while using a sippy cup. For this reason, some pediatricians and speech and language pathologists recommend straw cups over sippy cups. With Grosmimi straw cups, your baby is more likely to learn the new skill of pulling her tongue to the back of her mouth when she drinks.
In addition to learning the proper tongue and mouth placement for drinking (rather than suckling), your baby must also master the hand-eye coordination required to hold, lift, and tip her cup towards her mouth, all while sitting upright on her own. Straw cups offer less practice for these skills because your baby can successfully drink from them while still reclining and sucking, and not sitting upright or fully tipping the cup to her mouth.