In view of the handle, this would be described as a custard' - rather than a 'jelly' - a C20 collectors classification more than a contemporary description. It seems that early sales lists etc. didn't use these names, but words like syllabub and sillibub are mentioned quite commonly. Generally speaking, those examples that are tall, with bell-shaped bowls without stems or handles are called jellies - and the shorter bucket/cup shaped bowls fitted with handles are described as custards.
Although collectors differentiate in view of handle or no handle, there are nonetheless early examples of jellies with handles, and there are some very rare pieces with double loop ('B' shaped) handles.
It would appear that what we call jellies arrived on the scene first (as far back as c.1730 - with the deep narrow bowl with various moulded patterns, snapped pontils and high domed feet), and it is probable that the shape was a continuation of C18 short ales and drams, so perhaps they considered they already had an adequate design (which was without a handle, generally). Custards as such don't seem to appear until we get into the Victorian period, but that is just a thought, as I'm not really well up on these things - but they are seen not uncommonly and they make a very interesting area for collecting - and because they are small you can pack a lot into the cabinet

I'll take a bit of a punt re dating, and the fact that yours is flute cut - sits on a slightly domed foot (wear on the very outer edge) - is without a stem - has a pre c.1860 handle - might suggest a date of somewhere between 1830 and 1850 - plus the cutting is indicating Victorian also. If anything it might possibly be a little later in date, however.
Variation in custards is infinite, less so in jellies - hope you don't object to me adding a couple of pics. - the second one does in fact show typical rib moulded Georgian jelly glasses (no handle) from something like 1750 - 1760.
Ref. 'Seetmeat and Jelly Glasses - Therle Huges - 1982..........and...........The Arthur Negus Guide to British Glass - John Brooks - 1981. Although very small, Hughes is about the only guide devoted specifically to sweetmeats/jellies/custards, but it is cheap, and a useful intro. if you know nothing about the subject.