Neat, though clear containers will likely accumulate algae which is not ideal. You will wanna wrap in black plastic or something I'd imagine. Though I did like doing my clones in a clear plastic sleeve inside of a solo cup so I could lift it up and check the roots....

Edit I see the blackout or something used in the glass, how do they drain though?

Recycled yogurt net cups is brilliant. I can try that on my outdoor aquaponics. Ideally I'd get away from plastic but only other good option is food grade styrofoam..