'Jack In The Pulpit' is a casual name given to vases with one side of the rim pulled noticably higher than the other, often with the opposing rim pulled downwards. It is more or less exclusive to eBay sellers when applied to the Åseda vases. And 'Bonevase', as a proper noun, should only really apply to the Holmegaard originals, which this vase copies.
This chunky stem vase form was designed in 1952 by Per Lütken for Holmegaard as an exhibition form which wasn't put into formal production. The originals are one colour (without casing) and do not have bubbles in the base. See:
http://www.glashistoriskselskab.dk/index.php?option=com_joomgallery&func=detail&id=2402&Itemid=59The shape was later used for 'novelty' items sold through the Holmegaard factory shop for visitors taking the factory tour - these later versions from the 1970s were in clear glass and have random bubbles and swirls of mixed colours encased in the bases. The attached photo is of one of these on the Holmegaard production line in 1973.
It seems a few different glassworks copied the idea, but the Åseda ones always seem to have quite chunky controlled bubbles encased in the base. I do have one of these stem vases with a
very fine array of tiny bubbles in the base, with far better production values than the Åseda lot - I've never been able to find out who made it.