we have been known to make these and use them

Medical equipment. Any one want to play at being the patient?

Thank you for the invite!

Well this isn't an odd device and by comparison to some of these item it isn't very old at all but I though the folks in this group might get a kick out of seeing the history of the Coca Cola bottle.

Coca Cola History: Left to Right 1899 – 1900 – 1915 – 1916 – 1957 – 1986

Shackles were used as a method to capture and subdue a prisoner.  They are fasteners used on a person’s feet or hands to keep them from escaping.  They have been called swivels, manacles, swivels and handcuffs. Older models were one size, heavy figure eights of iron.  Present day handcuffs are much lighter in weight and are easily adjusted to fit most offenders.

Leg shackles have also changed throughout history.  They began as heavy iron rings cuffed around the ankle, attached together with an iron chain.  The iron shackles dug into prisoners ankles.  Often they were attached to a ball-weight as well.  Bilboes were a style of iron leg shackle that attached the cuffs with an iron rod, making movement awkward and difficult.  They have also become lighter and less cumbersome in present day, but they still make movement difficult

Set of 13 spirit bubbles, Edinburgh, Scotland, 1801-1900

No, not a plate of eyeballs but spirit bubbles. Although sometimes used in scientific research, historically they were used mainly to test the alcohol content of spirits such as gin, whisky, rum or brandy.

Numbers 22 and 23, for instance, would be used to test the proof of a double whisky; if it was the correct proof, the glass ball would sink to the bottom.

The set was made by A Lovi, in Edinburgh, Scotland.