Lol I picked up 2 of the same cylinders for plants. You gotta watch out, some of them are really poor made, i.e. very thin glass on one side and thick on the other. Take a careful look before getting one. They serve as pretty decent nurseries for stem plants.
Yea I noticed that when looking at them O.o and made an effort to get the most 'uniform' looking one. Hopefully this starts looking more jungle-ish once the plants grow and I could put a few shrimp in.