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Living in a world with superheroes is, quite frankly, a workout -- an intense physical (and emotional!) workout.
Why? Because the Earth is consistently imperiled by alien invaders, giant cosmic space gods, or other-dimensional despots demanding we reduce our encroaching reality.
So, after successfully avoiding acidic alien saliva, concussive force blasts from massive Kree armadas, and perpetually raining infrastructure, it's time to find a bomb shelter, open the Marvel Classic Superheroes 32oz Water Bottle, and rehydrate before Hawkeye directs you to the nearest Quinjet.