For events with a bit of warning, like severe weather, this sounds like a great idea. Could be great gifts for people who aren't "into" preparedness and don't want to normally store containers of water around the house. Even those kinds of people will generally feel the need to stock up on bottled water when a hurricane is headed their way. This gives you a good amount of stored water with minimal hassle and easy emptying afterwards. Certainly less hassle than frantically trying to buy all the bottled water at the local supermarket just before the storm hits.