Collector's item in the context of Ruby

A tobacco pipe, often called simply a pipe, is a device specifically made to smoke tobacco. It comprises a chamber (the bowl) for the tobacco from which a thin hollow stem (shank) emerges, ending in a mouthpiece. Pipes can range from very simple machine-made briar models to highly prized hand-made artisanal implements made by renowned pipemakers, which are often very expensive collector's items.

A silent butler, sometimes called an ash butler, is a small container, often of base metal, sometimes silver or silverplate, with a handle and hinged cover, used for collecting ashes or crumbs. They were more common during the 20th century, and enjoyed some popularity being made as a home construction project in the US. They are now often considered collector's items, or are valued for their retro appeal.

The Ig Nobel Prize (/ˌɪɡ noʊˈbɛl/) is a satirical prize awarded annually since 1991 to promote public engagement with scientific research. Its aim is to "honor achievements that first make people laugh, and then make them think." The name of the award is a pun on the Nobel Prize, which it parodies, and on the word ignoble. Most awards are for genuine scientific achievements with an unorthodox, obvious or humorous slant, while other awards are given ironically to various fraudsters, politicians, media figures, or promoters of pseudoscience.

Organized by the scientific humor magazine Annals of Improbable Research (AIR), the Ig Nobel Prizes are presented by Nobel laureates in a ceremony at the Massachusetts Institute of Technology. The winners also deliver public lectures. The Ig Nobel Prize monetary award is given in a solitary banknote for the amount of 10 trillion Zimbabwean dollars (US$0.40, but the banknote is worth more as a collector's item).