KeepCup 12oz Reusable Coffee Cup. Toughened Glass Cup & Non-Slip Silicone Band. 12-Ounce/Medium, Potion BPA free; non toxic; lid manufactured from polypropylene Tough; durable; fully-tempered soda-lime glass; recyclable New improved lid with larger drinking hole and inner seal. Meets osha (occupational safety and health) standards Microwave safe; lightweight and hard-wearing materials We estimate breakeven to be as low as 10 uses. Assembled in our Los Angeles Warehouse.