Hello gemndsum and Tracie-PKU. Please contact me and I will be glad to get information to you and how to purchase a unit for water. nJust to inform you this is very ligit and my son has used it and has help very much. He does not like going anywhere with out his water now. He is on the diet and does have restrictions but he is also 15 years old and this does help to keep his levels down. Please do not hesitate to contact me!