How do I cap a coolant nipple?

I’ve got a coolant nipple on my intake manifold, that I need to cap off. No longer needed. How would I go about in capping something like that? I doubt a vacuum cap would hold up.

put the original hose on it, cut it short, and put a bolt in it with thread sealer, and a clamp

If it isn’t pressed into the manifold take it out and put a proper plug in.

snip the nipple and weld the hole shut or do what turboLSjaun said

hahaha nipple

Thanks guys, i got it.