Are holy water bottles sacramentals?

I was thinking about [this question](https://christianity.stackexchange.com/questions/86541/holy-water-container-is-dirty) about holy water container cleaning. And I'm talking specifically in reference to anything between the ubiquitous holy water bottles you can get at the back of church that are sold at Autom in packs of 100 down to a 100 year old bottle you inherited from your great grandma caked with calcium. Are these sacramentals? Are they "converted" into sacramentals when they begin to contain holy water? Do they need to be blessed? Can they be sold (empty)?