The 11oz straw bottle is the ideal bottle for pre-k to early elementary school kids. Our 100% medical grade silicone straw top eliminates distracting drinking or lid removal noises of traditional bottles making them a teacher’s favorite! Our 100% medical grade silicone straw top is comprised of two pieces – the mouthpiece and the straight straw that extends into the bottle. This allows older kids to drink upright (with the straight straw attached). Additional information: ~ This bottle easily converts into an infant bottle, sippy bottle or sport/water bottle by simply swapping the straw out for another Pura silicone lid ~ Crafted from safe, anti-bacterial, #304 stainless steel and medical grade silicone ~ 100% BPA-free and will not leach toxins like plastic bottles and rings ~ Internal volume markings make measuring your child's milk or other beverage a snap. ~ Dishwasher safe and shatterproof