Good idea, I've opened packages of samples (not from you) where I've been blown away by the mixture of scents emanating from my mailbox...It's to use for samples: stainless steel, so I'm hoping that there will be less scent contamination from one sample to the next.
I like metal (SS or Al, I don't much care) containers, we have enough plastic in our world. That said, the Parkway tubs that so many of our soaps come in are perfect for our (SWMBO + myself) homemade moisturiser. Hoping not to need so many in the future though, I'm running out of uses for them in the workshop.