Without water we can not survive very long, because of that we need to make sure any container kit you carry can do a few things. It must be water tight so you dont lose any of the valuable liquid. You should be able to disinfect water either by boiling or using a filter. We carry stainless steel bottles and canteens that can be placed into a fire without a problem. The GI canteen is a good budget option as long as you have the cup with it. A camelback is a good go to as long as you have a filter. For a lighter option use a plastic bottle with a built in filter, just make sure to take care of it.