I have not seen another piece of glass this colour and it has so far defied all my attempts to identify it. It glows as though it should be uranium glass, but it isn't. I have found glass described as "canary yellow" that looks similar. I also thought Empoli from the style of the lid.
It is really huge - 10.5" tall x 6.75" base diameter, but not that heavy for it's size - most of the weight is in the lid.
I tried to photograph the base but the camera couldn't focus as there are no features on it. It's not completely flat - it rises up into the body of the jar a little at its centre.
The rim is folded under to increase the thickness - like the folded foot on a drinking glass.
The lid is made in 2 halves and joined together with a visible seam, but the body appears to have been made as is.
It's tempting to think it's an apothecary jar, but maybe a sweet jar?
Any thoughts appreciated as always.
Thank you
Cat