Sonic Tumbler Drinking Glasses!
This set of 5 glasses is from France. However, they look like something that would be from Sega World Sydney. France would usually take a few cues from the UK comic, so something "Very SWS" is slightly unusual for them.
The glasses are two sided, which is extra quality / someone was really making an effort for design and not being cheap. Each glass has a side-stamp showing that it was made in France, and the usual copyright/Sega info but otherwise doesn't make a lot of sense.

Each glass features Sonic and the classic logo on one side, and a different character or graphic on the other. But one of these images isn't like the others....
The first glass has a scribble background with the slightly odd & seldom used 'standing on 1 leg Sonic', the 2nd has the forward facing-face, third has finger-waving Sonic, the third is the same forward-face (but why) and the fourth has finger-waving Sonic again, but this time it's the other finger/or the image is reversed.
The backs of the glasses have Robotnick/cartoon/AoStH, who, as you remember SegaWorld Sydney has as its favorite / they never acknowledge the games nor the 'eggman' name or look, ever. The first glass has the unusual/seldom-used art of him 'stalking' or 'sneaking' with hands above his head. The 2nd glass is fist shaking Knuckles, the third has 'surprised-hop' Tails, the fourth has....Japanese Sonic carrying Amy Rose (from Sonic CD) & the 5th has 'angry Robotnik'.

Notice that every instance of Sonic PURPOSELY has his arms colored to blue.
At this point, they were absolutely attempting to re-design him at SWS. Then, it seems like when they ran out of art, they chose a Japanese one even though the style doesn't match at all & the Sonic is completely different looking. It's also an odd choice because SWS never favored (did they even acknowlege the existance of??) Amy Rose because of its desire for Sally Acorn from the Archie Comics and Sat-Am Sonic show. (Notice how they never use SatAm Robotnick, who looks very different from the weekday one, but they want to use Sally--who was never on a weekday. So they mix up games, comics, and two TV shows worth to try and construct their own world of Sonic. It's very interesting and that effort is represented across this set of shot glasses--which aren't even from Australia.)

Naturally, actual glass-glasses set isn't as interesting to kids as plushes, clothes or toys (in a general reference--of course some kids love collectibles at any age) so these glasses aren't that common. Also, being glass...they can break, or the deisgns likely could chip if they were used a lot, further contributing to their uncommon status.