Im a college student that doesn't have spare money so I love finding innovative container options.

My flat mate eats turkish yogurt and the container is a big plastic and circular, perfect to grow plants in! I just poke a few holes in the bottom for drainage. 

I've also used juice containers. 

For seed germination I've used old egg cartons.  

If you want a DIY green house just cut the tops off of plastic bottles to cover the seedlings individually. 

Sometimes I'll use metal cans as a water catcher. 

Have you come across any ideas for cheap containers?