Well, I think you can buy these gadgets, or just reuse them...
Foaming soap dispensers - super economical, highly functional, and reusable.
From left to right...
The first bottle is Thieves soap. It's a powerful, natural soap and disinfectant, etc. etc. But, the bottle is a foaming one.
The second bottle is an old Thieves soap bottle that I fill about 1/8th or so with regular dish soap (further right) and then fill with water. It makes washing dishes much nicer and I use a LOT less dish soap this way. Just a squirt or two whenever needed. And it seems to last really darn long... Gadget WEEKENDS
The dish soap foam comes out like this:Gadget WEEKENDS
The third bottle is the same foaming soap bottle with the label stripped, but this one is filled with some liquid hand soap and water.
On the far right are those horrible liquid soap bottles that spit out a tonne of soap that always seems to slip out of your fingers and down the drain before you can rub it into a lather. Again, the foaming bottles make it much more economical on the soap, not to mention easier.
I think you can buy empty foaming bottles, but it's just as easy to find them full and get the soap to go along with the bottle, then reuse the bottle. Why recycle perfectly good bottles when they're just as easy to refill?