Grain moth larva. Good luck. The damn things are a pain to get rid of once you have them. You'll want to pitch any food that isn't 100% air tight sealed (bags or boxes of cereal, rice, flour, sugar, noodles, etc.) and then clean out any cabinets really well to make sure you get rid of as many eggs as possible. After that make sure you don't leave any food unsealed for the next few months because odds are they will keep popping back up ocasionally for a bit and if they can get into anything when they do then the infestation starts all over. As far as infestations go they aren't the worst to deal with but they are anoying.

Yes, it is. If they’re in a flat, probably flour moths. Your friend should check any containers with food, especially grains.

It's clearly a gummy worm. You should be safe to eat it immediately. It should taste like what a flavour engineer in the 80s thought peaches kinda taste like

Free protein kind king!

You can put whatever they have infested in the freezer for a few days, then pick them out and transfer the contents to a sealed container.

When I lived in the tropics it was quite normal to have these in flour, grains, dried legumes, dried chillies etc.

The kind I don't want anywhere near me or any my belongings and most definitely nowhere near my food.

~~I'm quite outside of my expertise here, but I think it might be a mealworm. A beetle larvae. That would technically make it not a maggot (which are fly larvae).~~

~~But it's just a guess.~~

@PonyOfWar@pawb.social's suggestion fits better.

Looks like some fried rice I got once in Santa Carla back in the 80s. Thinking about it, eating take out with some dudes in a cave under a pier probably was not the smartest of things to do.