thanks

think I prefer pickles to celery vases - although it's difficult most of the time to locate a maker. My favorites are the uranium pair - pic attached - and I'm still looking for a Georgian example.

Hope you don't mind me adding this picture.
Mrs. Beeton discussed pickling methods for a multitude of foodstuffs, although not capers it seems (but she does refer to them) - but a lot of her pickled produce could certainly be suitable for smaller containers - so yes, you may well be correct Anne

Most ground stoppered jars - for pickles - are of a larger standard size generally, so guess these smaller ones were far less common.