Tears (what you produce when you cry, not gaps in bits of paper) were certainly used by Stuart, Walsh and Whitefriars. So if they used them, you can assume that everyone else in Stourbridge could have used them, and, probably, many glassworks in mainland Europe and further afield. Like Kevin, I don't recognise the shape, although that particular shape is unlikely to be modern.
Our revered moderator has touching faith in my ability to attribute bubbly glass. This is completely unwarranted, except for the most eclectic Walsh shapes. If you go into the souvenir shops at Roman sites like South Shields and Wallsend Roman forts, you will see wonderful "Walsh Pompeian" on sale, made a few months earlier presumably in a third world country. I deal in the Walsh originals and still can spend a long time making up my mind with unmarked pieces in my hands, with Eric's book, and a magnifying glass, and a UV lamp! It has to look right, feel right, be the right colour, and exactly match the patterns in the book before I will even consider buying or attributing it.
It is worth spending some time looking for the acid-etched Walsh mark. I have in stock one marked piece where you can only see the mark out of doors in cloudy light and if you know exactly where to look. It took me about a week to find it. The actual mark on this piece is just a very faint "als"!
Walsh Pompeian made for Hill Ouston and sold by them into the antiques trade is generally unmarked with a rough pontil mark, for obvious reasons.
There are at least two other mid-C20 ranges of bubbly coloured clear glass, including the range Kevin mentioned, all of which are as yet unattributed to my knowledge.
If you can't find a mark, it is probably best to take it to a glass fair and ask for an opinion. I doubt whether you will find anyone prepared to attribute it over the Internet.