Derived from sand, silicone manufacturing and reusability helps keep Earth’s less abundant natural resources intact. It’s an eco-friendly superhero that’ll outlast and outperform any glass, plastic, stainless steel and ceramic mug out there. Custom Silipints are made of 100% food-grade silicone and are free of BPA, BPS & phthalates. They’re built to last and safe to use for hot or cold beverages.