I heard great things about the refillable deodorant by Humandkind; there are no harmful chemicals, only natural ingredients derived from plants & minerals. It’s 40% better at killing Staphylococcus hominis, the bacteria that causes body odor in all of us, than other leading natural deodorants. And has been tested in an independent certified lab.
While Humankind’s deodorant has antiperspirant qualities, they can't call it one because they never use aluminum or parabens (ingredients required by the fda to be labelled an "antiperspirant"), which have been linked to diseases like cancer and Alzheimer’s.
If you’re switching from an antiperspirant, give your body a couple weeks to cleanse out toxins and adjust to our aluminum-free formula. Their refill is a 1.6 oz per Kindfill (refill). The container is guaranteed for life and available in 4 colors off white, grey, charcoal and neon (green yellow) - $1 of each container purchase goes to removing plastic waste from the ocean. The deodorant itself is available in 2 scents (Rosemary-Mint or Coconut) and unscented.
Although the deodorant container itself is made of plastic, you will continue to use it, so it is cutting out single-use plastic. And their refills arrive in almost all biodegradable packaging with the exception of a couple small plastic components needed for the refill to function - they are continually working on reducing waste and improving their packaging.