The wraparound labels on conventional round bottles were difficult to read, so she designed a flat tube-shaped container that stood upright on its cap, with plenty of room for a large, flat label that could be read easily at a glance.

WSJ: When Simplicity Is the Solution

Macchiarini performed the nine-hour operation on April 9 at the Children's Hospital of Illinois after carefully creating the windpipe using stem cells from Hannah's bone marrow that were saturated over a matrix of plastic fibers shaped into a tube.

CNN: Toddler gets new windpipe from her own stem cells

Each piece then gets hand trimmed or pinched into shape, he says, showing how a thin tube of clay will be shaped into candelabra that looks like a long, thin piece of coral.

WSJ: Lily Pads and Bamboo Stalks, Made of Clay

Though the Astor's bolsters stand alone, most designers still use the tube-shaped cushions as part of a pillow mix.

WSJ: Bolster Cushions Win Best Supporting Rolls

While researching the Tube's history, the museum reported the differing opinions about the project in a newly-published book, called Underground: How the Tube Shaped London, to mark the anniversary.

BBC: ��Sulphurous�� fumes and class division on Victorian Tube