Here's a slightly busy modern mug by Ikon. It has 3 full body Sonic modern stock poses, 1 big modern head, and the modern logo. As you can see, it comes in a nice display box that leaves the side open to see the design, while protecting the handle. The mug is both dishwasher & microwave safe, so it's sturdy. 

Owned by Bianca Nishitani

This mug is for sale at Target Australia (also $8) it has a Sonic only theme, with portrait, logo & modern stock arts. It's box is the same as the first. Notice how the box is similar to the Ikon (online store) mug's box.