Artist Kerry Gammill is widely known for his comic book work but he has also had a successful career in design and concept art. Some of my favorite examples of his work though fall within the "Super Hero Food" genre. Here's a design he did for a squirting Captain America topped water bottle:
And here's a look at how it eventually turned out:
Here's the work he did on a Spider-Man squirting bottle of water:
And the end product:
Sorry for the bad picture, it's an older one. Here's a design for a Hulk squirter:
I'm not sure if these ever got made but if they did, I never found them. Check out more of Gammill's work on his website.