Just the other day, I had a brainwave. Why not have a tubing test tube replacement?
Here are some of the cons of glass test tubes:
-They break easily.
-They are expensive.
-They roll around, causing significant stress to any colony.
-You have to switch test tubes when the water supply runs dry.
-They are heavy (in comparison).
In Home Depot or Lowe's, you can purchase 10 feet of this stuff for just 4 bucks. The PVC tubes and many others have the strength of plastic but the clarity of glass. If you turn it in a curve, it will not roll. You can stuff one end with cotton, fill with water, and stuff in more cotton, and you have a test tube replacement that can be refilled by taking the cotton at the end and add more water.
Any thoughts? Thanks.