DIY plant pot- milk jugs and more

I've really wanted to start growing some of my own food. But I have little motivation to start an outside garden for two reasons. One, we don't own the house or plot of land it sits on. So I know all the hard work I put into clearing a spot for a garden may not be utilized after I'm gone. Which feels sorta like a waste. Two, we may be moving this summer. And if not this summer most likely by the next. So I may nor may not even get a full growing season out of the hard work. So in hopes to both fully me desire to grow my own food while keeping the work load manageable I've decided I can plant herbs and maybe even a few vegetables or whatnot in pots. That way I can start now and when it gets warmer just take them outside. My big dilemma with this is I don't want to spend money on buying a whole ton of pots. :( Luckily I ran across this tutorial for making a planter out of a milk jug on Instructables.com. Quick and Easy self-watering garden planter. I've already tried it and I have two little sprouts that just popped up yesterday. I was so very excited!!

Well this got me thinking of other things lying around my house that I might be able to use. We don't really drink pop, so I don't have 2L bottles. But I do have other things that might work. My big idea is using a tidy cats plastic container as a planter for a tomato plant(or other larger plant). We have three we got off of freecycle to use as a diaper pail. But we really only use one right now. We keep it in the garage and take it with us on all day trips. Anyway, while I don't have cats and their for don't buy litter, I'm sure I could get more off of freecycle. And they should be just big enough for one tomato plant. :) Yeah!!!!! So now I just have to go try it. I think I'll probably wait till I finish planting the rest of my herbs. Just need to finish this next jug of milk.