I can't imagine that either is that common, now, although no doubt produced very plentifully back in the 1880's - and sad to say that since the collecting of this type of pressed glass has waned somewhat, then probably not going to be massively desirable at the moment. Wall pockets seem to have been quite popular in the second half C19, and Sowerby produced several designs, with this sort of shell motif being, perhaps, a common form of decorated pattern. There are illustrations in Sheilagh Murray and Sowerby's own pattern book No. IX from June 1882.
The clear can or mug is probably unique
, insofar as it was personalized with the owner's initials maybe - although it's unlikely that it was 'hand etched' - etching being used only if acid was involved. Much more likely that the decoration was applied by the process of copper wheel engraving.
Whilst these pieces may not have vast commercial value, I'd say they're interesting examples of Sowerby's work from that period, and worth hanging on to, if you collect pressed glass from the C19 that is.