Where's Sonic on this mug?
He's hidden in plain sight! This is a "heat changing" mug, where, when you pour hot liquid into it, the black coating 'dissappears', revealing hidden designs! Obviously, with the eyes & ears showing there, you can tell exactly where Sonic will appear...but not what pose he's in. There are also rings, and the 'ground' checkering indicates that Green Hill elements will also likely be revealed. It looks like the handle and interior are likely light blue.
Gimmick mugs like this require extra care, like not microwaving & not using the dish washer, nor putting them in the fridge/freezer...but, they are still a fun collectible. What does this mug look like when it's changed? A photo will be added as soon as someone changes one & sends it in.