The Protector. Known as a protective stone, Obsidian shields you from others negativity. It’s also been known to bring clarity, strength and support during times of adversity and change.Holds approx 450ml of water. Include bonus neoprene water bottle cover. We use Borosilicate glass which is lead free, BPA free and more resistant to thermal shock. Bamboo lid & base. Sustainable & reusable.