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).