I like the people who make primal pit paste. The coconut oil ones work well for some people, but not for me.
I use only the crystal stick.
A natural alum is NOT the toxic alum compounds in commercial deodorant and not a problem...after all, it’s a natural compound found in mineral water and even some foods, and the body needs/uses all those elements...the problem is the synthetic unnatural compounds the body reacts badly to.
You can get a crystal stick for deodorant at any natural products store.