If you are like me and use a 5 gallon bucket to store your water for you Mistking system, I found the best lid to make adding water to it so much easier. You can find them under $6 on the internet in vast colors. This was the cheapest place i found online

Gamma Seal Lids Low as $3.95 ea - Buckets Bottles Cans & Lids

after the shipping price though you are better off just going to home depot and buying one for $6.00 and some change. Make sure that the o-ring is there on the rim piece before you buy it, as some people have said they ended up with one that didn't have the o-ring in it.

I'm uploading a video that i shot about it here to my PC at the moment and will provide a link to it shortly