These cups are made from borosilicate glass. This is toughened, lightweight, 100% BPA free, heat resistant, dishwasher and microwave safe glass that is also used in cookware, modern baby bottles, laboratory glassware and common domestic appliances. Hey, this thing has strong survival skills. Imagine how many years of joy it will bring you!
Other features include:
- A splash free lid that means you get to drink your beverage instead of wear it.
- A thermal silicone sleeve.
- A nose dome (ergonomically designed lid gives you the space you need to avoid embarrassing nose-to-lid collisions.
- Reusable, environmentally safe, and recyclable packaging!