Quartz Tourmaline is believed to balance yinyang energies & promote inspiration, happiness & confidence. its a stone that will help strenghthen your spirit, enhance your motivation & give you encouragement whilst infusing you with patience and compassion. Tourmaline transmutes negativity into positive energy.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.