Show me your DIY storage tank!

[-RYknow]

Hey guys. I just purchased my first RO/DI unit, and I'm looking for a good storage tank, even if it's a DIY. So, if you engineered a storage tank (even if it's just a jug with a valve), please post some pics! I'm looking for something moderate in size, smaller then a 55 gallon drum. I'll be using this for top off & water changes on my new 20 Long reef build, as well as my 150g FOWLR.

Thanks,
-RYknow