It used to be that if you’d been “naughty”, you’d get lumps of coal in your stockings. Or at least that’s what you were supposed to get but hey, you never really did. But with the above “Gift Of Nothing”, you really can give the person who has everything the one thing they don’t have: nothing. It’s a simple plastic sphere filled with not a single thing but air, but it’s also a few other things at the same time: a philosophical rumination on the semantics of “having everything”, a tongue-in-cheek way of getting out of buying an actual present, and a good way to be a shitty friend/family member if you actually go through with not buying a real present.
Think of it as a gag, we suppose. Something you give to look at the person’s face, before you pull out the real present. It’s $5.67, which isn’t all that much for a joke.