My terrariums are rather carefree. You DO have to water them monthly. While growing cuttings and preparing terrariums, I often place cling wrap over the opening of my terrariums. I found that I could leave the terrariums for months without touching them.
So, I thought this ease of care would be great for clients. The difficulty was in creating an attractive stopper that would not fall out of the vertical opening. After a bit of thought, trial and error, I came up with a hand blown glass stopper (see above). Now, if clients choose, they can enjoy an even more carefree terrarium.
In addition, I love the slight condensation that builds up on the inside of the terrarium... very atmospheric.