Material: pure medical grade silicone Unbreakable, safely used in microwave, freezer and dishwasher safe, easy to clean and heat-resistant Anti-dust,odorless,more durable and long lifespan,easy to wash and handle Replicates the tactile experience of breastfeeding Helps reduce baby feeding problems like colic, spit up and reflux Bottle type: wide mouth, natural flow, anti-colic Customized designs, sizes,logos,and colors are accepted