This MIGHT be a UK item.
Or, it might be US. This clam-shell style package had a wrapped chocolate egg in a ceramic Sonic mug. The egg part gives it away as some kind of "Easter Gift" where you get candy and the mug at the same time. You can also tell it came out at Sonic 3, because of the spheres/balls special stage background. It uses AOSTH Robotnick, but it has normal (non brown/non-stupid) Tails there in the bottom corner. So, there is no 'difinitive give-away' proof of where this was released on the packaging.
Of course, being ancient by this point, the egg has long since had to be removed. (Old chocolate turns to powder) The description says "Milk Chocolate Hollow Egg With Sonic the Hedgehog Mug". This is an old photo so it is small & you can't read the logo. If you have evidence of where this was released, you can write in for credit.