Our Product Composition:
1. Glass Cup – High Borosilicate Glass 53%
2. Cup Cover – Silicone 20%
3. Straw – Silicone 7%
4. Lid Cover – Silicone 4%
5. Cup Lid – Natural Bamboo 16%
NOTES:
????Glass Tumbler: soapy water or wash on the top-rack of your dishwasher. Do not need to remove the sleeve. Store with the cap off.
????Bamboo Lid: hand-wash with warm, and needs to be washed every time after use and air dry