Be Better. Great Taste. No Preservatives. Non-GMO. 1 Liter Tetra Pak. Amy &Brian’s non-GMO coconut water, is 100% natural and 100% pure juice, now available in 1 L Tetra Paks, allowing you to enjoy Amy & Brian coconut water all day long. Rich in electrolytes such as potassium, magnesium and calcium, our slightly sweeter taste comes from the young coconuts we personally select to ensure you have the best taste, benefits, and value.