The old timers used to get several really good glasses, normally with faceted surfaces, and have a person who did repair on glassware and/or crystal do the necessary modifications. Donald Holmes produced a particularly nice M***** glass that was made of high lead content crystal. The glasses often show up without the gimmick.

I think Mephisto Huis was the Belgian source of many good magical items.

Kent:
No, but still I think they are excellent routines with glasses!
Sorry if I'm off of topic,
Hansel!

Kent:
No, but still I think they are excellent routines with glasses!
Sorry if I'm off of topic,
Hansel!

Hansel how did you post as Reynold ?

It's magic.

It's ventriloquism, you silly wizard. He can even do it while drinking a bottomless glass of water.

LOL! He is practically my brother! I'm using his computer and reply when he is Signed On!
Sorry for that,
Hansel!

In the old Stevens Video Series: The Magic of Spain, there was a cups & balls type routine using clear glass. I think it may have done by Vanni Bossi. It was excellent.

My nephew broke my 'glass' slot glass years ago, and I would like to get another, if anyone knows a current source or wants to sell one. Half-dollar size

Go to the nearest big town that has a person who specializes in making leaded glass windows. They have tools for cutting and polishing glass. Tell them what you want.

I had three types of mirror glasses, a ball glass, a slot glass, a bottomless glass, a stage sized penetration frame, a rising card glass, and an elegant dribble glass made several years ago by Riser. His main business is high end crystal engraving and he has the equipment to do the job correctly. There is too much snow plowed in front of the storage unit to go measure them right now. They are a decent size though. I think he provided a plain glass to match the others. I did not order it at the time. Find a glass cutter or engraver for the job.
MR

Old web site I think, but here the book previously referred to:

http://trickster.com/catalog/c-bookpage8.html

Terry

Kanters Magic Shop in PA sold the demons glass copyright 1947 Mitchell Kanter.

Gimmicked glasses are not usually suitable for close-up work and don't really fit the category of "Ever So Sleightly" ("Discussions on magic that uses sleight of hand skills") , however , because I noticed earlier in this discussion thread (10 years ago !!) Gene Gloye's books on trick glasses were mentioned I wanted to point out that anyone interested can purchase a PDF version of these Gene Gloye books on Lybrary.com.

These are actually tricks with plastic cups (such as the popular "Solo" cups and similar types of disposable plastic cups) not with glasses as such.

https://www.lybrary.com/eugene-e-gloye-m-112116.html

The books are "Fantastic Tricks with Plastic Cups" and "More Fantastic Tricks With Plastic Cups".
(similar material is covered in Sam Berland's "Tricks with Paper Cups" - https://www.lybrary.com/tricks-with-paper-cups-p-273.html )

The thing is , some of these gimmicked plastic cup ideas can be adapted to using heavier acrylic or lucite tumblers, which look similar to real glass (especially from stage distance) , but are unbreakable. The advantage of the disposable plastic cups is they are so easy to work with (easy to cut with an X-acto knife or small shears). But if you have tools and patience to cut acrylic (or have the job done by a local plastics company who have the proper saws, drills, and expertise to work with acrylic) , you could adapt some of the ideas in the Gloye books (and Berland's book) to heavier acrylic tumblers. Although in some cases using a common item like a disposable plastic cup is an advantage . These disposable cups are so common and apparently "free from guile" , that most audiences won't suspect them of being gimmicked in any way.

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Yes, I agree in many cases nothing beats using real glass. Particularly heavy fluted glass for a B_ttoml_ss glass or M***** glass , or glasses with a "waffle" or "diamond" cut pattern used for a M***** glass. The heavy fluted or diamond cut glass pattern creates a subtle distortion that disguises the presence of the gaff better than a similarly fluted plastic glass in my opinion. It's a subtle difference. This pattern, by Libbey, called "Radiant", is particularly good for a M***** goblet or M***** tumbler. See:

https://www.replacements.com/p/libbey-gl......64148201

and

https://www.replacements.com/p/libbey-gl......64156421

This pattern has the upper edge of the glass clear , then a diamond cut pattern , then a fluted pattern below that which effectively disguises the presence of the M***** . The M***** edge is positioned so it is below the upper clear part of the glass, just below where the diamond cut pattern starts, so there is little danger of flashing the edge of the M***** .

I made one from the Libbey Radient water goblet. Here's a photo of it with the M***** in place:

Click here to view attached image.