The udderbot is the only slide glasswind instrument that I have heard of.

"Udderbot" is the name given to the instrument invented during the year 2005 near Jacob Barton. I say "near" and not "by" because the event, like most of reality, has a collaborative nature.

The udderbot is the object that is composed of a union between an udder (typically a rubber glove) and a bot (typically a bottle with the bottom removed).

The udderbot is the variation on the normal bottle which permits it to achieve a continuous 4-octave glissando.

The udderbot is the folk instrument without a folk.