Very cool!
We don't have Menards here, but I've been saving clear plastic containers from cored pineapples, fresh fruit containers and pre-made salad containers. I'll have to check out our local $ Stores. I did have a trash bag full of water bottles to make mini greenhouses, but somehow lost it during our move from our previous home to our current one. I have a sneaky suspicion that they may have been accidentally (on-purpose) dropped in the trash can.