Certified water flavour standard kits. We manufacture a range of water flavour standard kits to make choosing among our 25 water taints a little easier. These certified water flavour standards are nanoencapsulated to make them easy to use - just add a capsule to a litre of water - and safe to smell and taste. We ship anywhere in the world free of charge. Buy with confidence on our secure website, safe in the knowledge that if you are not completely happy with your purchase we will refund your money.