CHF24.70
Sigg Gemstone
Question about Sigg Gemstone
What is the seal and the inside of the lid made of? If plastic, which one exactly? Silicone would be great. Polypropylene may be acceptable if pure. (BPA free does not mean that no other, sometimes worse additives were used).
Should be silicone. The accessories for the other bottles are made of silicone. But surely this is a question for the manufacturer