Coloured cream jugs similar to this were made in profusion during the last quarter of the C18, in amethyst, various shades of blue, clear, green - with feet, without feet - probably mostly with a kick and accompanying pontil scar. Of course always with the top down strap type handles, and frequently with folded top rims, and probably all with some sort of moulded pattern - trellis/wrythen/ribbed - often looking rustic and wonky like this one. Probably made in a variety of places in Europe plus the states, and it's possible that Steigel imported British examples and copied the shapes etc.
If genuine I'd have thought c. 1790 - but always worth running this past someone like Peter (oldglassman) who may well have some better suggestions to confirm or otherwise. Size wise it sounds on the small side, but that may not be an issue, and I'd have thought period pieces expensive.
sorry this isn't the positive id you may have wished for.