Most complex life forms are a tube within a tube, and the internet is more like a series of tubes.
Couple's Daily Question Mug
Coffee Mug
One is a hollow cylinder and the other a silly Hollander. Source (Cause I can't claim fame for Victorian era jokes):
Neither of them can be used as functional tables.
The were only two donors. One came on the bus, the other missed the tube.
A graduated cylinder.
Mani-tubing
The tube top was strapless.
The tube sock under my bed.