Aluminum based antiperspirant
Regardless of how you feel about it, it's sad that as a consumer it's so hard to find a zero/low waste aluminum based deodorant.
I know there are salt crystals, baking soda, and various other options. For those who can use those and be happy with whatever result it renders for the--great. But for those of us that need it, or even just want/like it, it's frustrating that I can't seem to find an option anywhere.
I don't understand why the brands that do make responsibly packaged deodorant don't make a separate line that does include aluminum. The most responsible thing would be to try and accommodate the broad market (most people I know use aluminum based), even if they also want to also supply alternatives to the niche groups that don't like it.