350ml (12oz) is the perfect size for carrying daily. It fits nicely in your hand and in most cup holders. Silicone carrying loop is easy for your carrying with comfort. Borosilicate glass drinking bottle is great for everyday use with water, smoothies, juice and even mixed drinks. Take the bottle to the gym, on the go, to the office, hiking, and even camping.Borosilicate glass which is environmental and healthy material with BPA free.