"• 100% Plastic-free & only Non Toxic Certified bottles. • One Life, One Bottle concept. Bottle can be converted into a straw, Sippy or small water bottle by swapping with another Pura Silicon lid. • #304 stainless steel & Medical Graded Silicone accessories. • Internal marking makes you measure child's milk or other beverages. Each ounce (appx. 30g) is marked & visible at a glance inside the bottle. • Dishwasher safe, shatterproof. The Pura INSULATED sippy cup features a double-wall vacuum insulated stainless steel bottle (18/8), and medical grade silicone components including XL Sipper Spout, travel cover, and sleeve. Like all bottles in the Pura Kiki collection, the Pura insulated sippy cup contains zero plastic parts! The included silicone sippy spout is a fast-flowing spout that helps your child transition from a bottle nipple. Ideal for children 6 months to 4 years, this sippy cup is compatible with all silicone components from Pura including our Natural Vent Nipples in various flow rates, Silicone Straw, and sealing disks. Each cup has pressed internal volume marks that can be clearly viewed on the inside of the bottle for easy measuring. The bottle is also compatible with nipples and spouts from other brands. With Pura you can rest assured that you are always using the safest and most eco-progressive bottle on the market. One Life...One Bottle. General Instructions: Wash before first use. Boil for 5 minutes to sterilize. Remove the sleeve from the bottle at least one time per week to clean between the bottle and sleeve, more often in humid climates. Dishwasher safe. How to install sleeve: Add baking soda to the inside of a dry sleeve then slide onto the bottle. Rinse thoroughly. OR At the sink, spread a pea-sized drop of liquid dish soap inside the sleeve then slide the sleeve onto the bottle. Rinse thoroughly."