We found a zero-frustration sippy cup: no slurping air, no wasted drinks! This smart sippy cup has a weighted straw that "follows" the juice, so kids can drink every drop, from any angle. We also like the soft silicone straw, which can't poke little mouths. Straw sippy cup holds 6 fl. oz. and has a flip-up top with integrated handles. Top-rack dishwasher safe. For ages 9 months and up.. Good first straw sippy cup for babies learning self-feeding, because the straw is soft and works at any angle. Sippy cup is made of polypropylene, with a food-grade, silicone straw and stainless steel weight. BPA and phthalate free.. Sippy cup measures 4¼"L x 3"W x 5½"H