This is probably the creepiest thing you will see all day. The algaculture symbiosis suit seen here was designed by Michael Burton and Michiko Nitta. It was specially developed to feed you on the go.
The tubes that are placed in front of your mouth use the CO2 you generate to “feed” an always-growing population of algae that lives in the suit. If you are in enough sunlight, the algae will grow and feed you.
It probably does not taste good. However, if the poop hits the fan one day, something like this could save your life. It is a fascinating concept, even if it does look silly.