I bought the Aquablox/Aqualiterz specifically for keeping in my truck for worst case scenario, emergency use only. I needed something that could withstand the high temperatures that we encounter during the long hot summers here in Houston, TX. I liked that it met the U.S. Coast Guard requirements for drinking water stored in a life raft that state that "The water in the container must be sterile and free from organic matter, sediment and odor" and "The water must be suitable for storage in the container and retaining its sterility for a period of five years in temperatures ranging from -30°C to +65°C (-22°F to +149°F)". I haven't seen anything in the grocery store that would compare.