This set of plastic cups were sold at KFC stores in Canada only. They each have a close up of a character’s face, with a vaguely-character-related phrase on the back.
Apparently it’s a set of four, but I can’t find any images of them anywhere. My guess is the fourth cup would feature Marge and may or may not include Maggie – in these sorts of things Maggie is often relegated to featuring alongside another family member, rather than having her own item.
This set of cups was sold in 7/11 stores, done up to look like the Kwik-E-Mart, in 2007 to promote The Simpsons Movie, along with a set of magnet straws. Far as I know, they were only released in the US. All have the Squishee, Slurpee, and 7/11 logos on the back (bottom right)