What do you folks do with those empty tubs?

I do not buy plastic tubs. All plastic is partly virgin material and to various degrees recycled. The problem is what little is recycled eventually becomes product not recycled. The number one particulate material after salt in the world oceans is plastic. Off the US island of Wake all world currents eventually push a large percentile in a floating island once measured as large as Texas. Plastic particulates are now found in the flesh of several species also suffering from mercury poisoning. Plastic fishing nets become floating dead zones of ensnared marine life up to and including turtles and the great whales. smaller species including seabirds will ingest or become trapped in the debri leading to death.
So, ethically I only buy soaps that come in recyclable paper, aluminum or glass.

Do we have to turn every thread into some socio-political environmental issue commentary? Sheesh...we're talking about RE-USING plastic tubs that would have otherwise been thrown away or heaven forbid, recycled.

OP asked what the end user does with the packaging. I replied what I do (recycle glass and aluminum ) and my own reason for not buying soaps with a PCC I cannot ethically pass on into the environment. I have never sent anonymous ELF letterbombs to MysticWaters, or urged boycott of Dr Selby.
What other people buy is their freedom to purchase and promote. If one can find fault in my reasoning do share.

I do not buy plastic tubs. All plastic is partly virgin material and to various degrees recycled. The problem is what little is recycled eventually becomes product not recycled. The number one particulate material after salt in the world oceans is plastic. Off the US island of Wake all world currents eventually push a large percentile in a floating island once measured as large as Texas. Plastic particulates are now found in the flesh of several species also suffering from mercury poisoning. Plastic fishing nets become floating dead zones of ensnared marine life up to and including turtles and the great whales. smaller species including seabirds will ingest or become trapped in the debri leading to death.
So, ethically I only buy soaps that come in recyclable paper, aluminum or glass.

Do we have to turn every thread into some socio-political environmental issue commentary? Sheesh...we're talking about RE-USING plastic tubs that would have otherwise been thrown away or heaven forbid, recycled.

KAV, did you even bother to read my original post?  I also mentioned metal tins, as well.  I was just looking for, perhaps, new to me ways of repurposing the tubs, nothing more.

I'm sure you do your best to be responsible in the products you buy but I wonder just how much plastic, in one form or another, impacts your life for good as well as bad.  Therefore, I agree with Jeff, kindly stop turning every thread into some socio-political commentary.  If you believe it deserves its own thread, that can be done without the socio-political aspect and you might title it something along the lines of, "How can we reduce the use of plastic in our wet shaving products?"  Folks might chime in with some great ideas and perhaps our Merchants could tell us why they choose to package as they do.  However, your many comments that seem to come across as reproaches are, quite frankly, becoming tiresome.

What is Franken Soap?

Empty tub?  I've never seen one.  Does such a beast exist?

I have to admit that this was my first thought when Freddy posted this thread!  
Wow, I need to start using up some of this stockpile I've accumulated!

I would probably have No soaps if I had to find out the make up of the containers.

Most of them are attractive AND REUSABLE.

So I say:

NUTS
CANDIES
JELLO PUDDINGS (Sugar Free)
DIPS
PUCKS (SOAP)
PUCKS (HOCKEY) Well you could. No I wouldn't.
SINGLE FLOWER (Or two or three small ones)
CAT'S MILK (Not too cold please)
BUTTONS
STICK PEN NIBS
FINE SAWDUST (For wood filler)
BAGEL (for lunch)

Mickey

I am not trying to be facetious.

If that waste plastic is so concentrated would it not pay some company to salvage it and recycle it thus obviating or at least minimizing the need to manufacture more plastic? Perhaps ey could even lessen the amount of new plastic created.

Mickey

What is Franken Soap?

I've not heard this term applied to soap before but I'm going to venture a guess that it might be a tub of soap containing 2 or more different soaps pressed into the tub beside one another. Like a pizza with one half with one topping and the other with a different one. Most of these soaps are quite malleable so I could imagine taking some Mike's Natural lime and pressing it into half a tub and filling the other half with his bay rum for a bay rum and lime or some other crazy concoction. The permutations are limitless although at some point I would think you'd get some muddled nondescript smelling melange.

What is Franken Soap?

I've not heard this term applied to soap before but I'm going to venture a guess that it might be a tub of soap containing 2 or more different soaps pressed into the tub beside one another. Like a pizza with one half with one topping and the other with a different one. Most of these soaps are quite malleable so I could imagine taking some Mike's Natural lime and pressing it into half a tub and filling the other half with his bay rum for a bay rum and lime or some other crazy concoction. The permutations are limitless although at some point I would think you'd get some muddled nondescript smelling melange.

Something along that line .

Or if you end up buying a lot of sample, but don't want to finish all of them, so after 1 or 2 shaves from each of them, press the rest on a big container and mix it. Don't ask me which fool did that.

Mickey, With a marine architect I designed a hull modification to a twin hulled tanker, many available at massive breakers in SE Asia for scrap prices.
It involved a refabricated bow with a large intake mimicking baleen whales and large filter feeding sharks. The ship would cruise slowly through large debri fields recovering the plastic and letting the water flow passively out the stern, much like the propulsion system in RED OKTOBER which itself was based on an ingenious two man sub built by Italian Regia Navia POWs guests of HM forces WW2. We designed escape devises for marine life monitored by cameras in use by more enlightened fisheries.
The plastic would be incinerated in very high temp furnaces to power old fashioned steam turbines with zero emissions,minimal ash residue and zero fossil fuel use.
The concept was for a small fleet to cruise known debri fields and reduce the initial waste before it could become the dangerous particulate material. Concurrently a young biology student invented a small working model of a shore based filtration system. We donated the design to a fellow Canadian of controversial action who I once crewed with.
The investment would be minimal, which, equals the present interest.