Natural deodorant salt bars?!
They are awesome, they work (even on my sweaty and doubting husband), they are healthier (no breathing in weird chemicals), they last FORVER (one bar has already lasted over a year and I expect it to do another 2, no joke) and therefore they massively reduce both cost and waste. I reckon that using them has prevented us using 40ish aerosols over the last few years.
Try them and spread the love. Salt of the Earth is good, but packing lets it down, my current fave is Native Unearthed.