Rollr
Rollr makes a refillable roll-on deodorant that tops up with a powder sachet instead of a new plastic case each time. The refill mechanism has a patent pending.
Why It's BRIMM
As seen in

“Brimm’s identity eschews eco tropes”
— Creative Review“BRiMM is changing the way we shop – and for the better”
— Country & Town House
“I love buying through Brimm”
— The Guardian