the water should be pressed out of the sucking part to ensure hygiene

It is made from 100% natural rubber with a vent in the nipple part

latex will also have natural variations in the material that can be seen in this light

The tray is dishwasher safe

Madkasse - Ruminddelt med Bæger - 1

Sistema Drikkedunk - Square - 475ml - Ocean Blue Rygsække og tasker the water should be pressedSistema Water Bottle Square 475 ml. (Minty Teal) Material: Plastic free from BPA and Phthalates. Cleaning: Can be washed in the dishwasher on the top shelf, but for increased durability, hand washing is recommended. Suitable for storage in the freezer. Made at Sistemas own factory in New Zealand.