Similar shapes came from most of the big Scandinavian factories during the '50's and '60's, and Whitefriars/Baxter offered one or two designs vaguely similar ish I believe. Think we tend to call them 'free-formed' - 'free-blown' or sculptural, and most of the better ones were cased.
But as Michael has said, also knocked out by eastern Europe in more recent times, and probably impossible to id, unless you have the label.
The early ones from Sandinavia were signed, sometimes, Holmegaard for example, and fetch decent money I believe.