They’re labelled “oxygen removers”, so I rather assume that’s what they’re for. Dessicant is something else entirely.

I own a property & live part of the year in Thailand, and have worked in China for a decade - I don’t need grandma to teach me to suck ants. Amazingly, in all that time I’ve discovered that a single layer of plastic and a bag clip is, in fact, entirely adequate to keep both humidity and ants out of food.