They’re talking about something like top ramen, a very low quality dehydrated shadow of real ramen. It’s just a packet of noodles and a bag of seasoning. It’s pure carbs and not very nutritious, but you could get it for like $0.07 a meal (who knows these days though)

There’s also good instant ramen, which ranges from $1-$5ish, and is much closer in taste to the real thing. It’s not super healthy either, but you might get some dehydrated vegetables, meat, and/or oil to go with the spices