All parts of screw ring and container are made of Polypropylene. The innerside of the handles is made of Thermoplastic Elastomer (TPE) plastic.
The Spout of the 6+M toddler cups are made of silicone. The hard spouts of the 12+M and 18+M toddler cups are made of Polypropylene and the valve is made of silicone.
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