Ship, I have kept maggots for up to three months at a time. I do not add food or water. As long as you keep the lid tightly covered, condensation will form, and that is enough moisture for them. I do periodically change the bedding. If it has a strong ammonia smell, replace it. For storage, I use the little plastic Ziploc/Glad containers you get at Walmart for a few bucks. They're cheap and work well.
The maggots sold in this country are not sterile. If a maggot gets out of its container and finds a nice, warm spot, it WILL turn into a caster and then into a fly. I know. It's happened to me several times! It's not a big problem, though. Blue bottles are big, slow moving flies. You can practically catch them with chopsticks (like in "The Karate Kid".)
Now a question for you: you get your maggots from a local bait store?

In Alabama?
