I made my first batch of cold-process soap earlier in the year – it took FOREVER to trace, but we’ve loved the resulting soap so I need to make some more.

Ever since I made that first batch, I’ve been on the look out for what I can use as moulds this time around. Last time, I had two old food trays for bar soaps, but when I ended up making a lot more soap than I’d originally intended, I grabbed whatever else I could find – some shaped fruit trays (small hand soaps), an old round ice cream tub (too wide when sliced into discs so had to cut them into semi-circles, which was a bit odd) and the square edged plastic bottles the olive oil had come in (nice size hand soaps, but it was awkward to get it out). (The latter two can be seen in the picture.)

All sorts of packaging has been subject to my “would it make nice soap?” eye. A few weeks ago, I was reading about someone else’s soap making on Simple, Green, Frugal and she mentioned using poster tubes (with the bottom sealed up) to make nice sized round soaps. As we’ve not had any posters or the like delivered recently, we haven’t got any of those but it got me thinking about similar cylinders: a litre-ish, straight-ish juice or pop bottles would probably about the right size, although it’d probably be awkward to get out like the olive oil bottle. That led me down another juice line: John has got a bit of an obsession with chocolate soya milk at the moment which comes in tetrapak containers – that would be a nice size for square bar soaps and be easier to cut out…

Anyway, long story slightly shorter, what else can I reuse or recycle to make either interesting shaped soaps or simple practical ones? If you make your own (cold-process) soap, what do you use?

Do you have any upcycled moulds that you can reuse again and again rather than destroying (like would happen with the poster tube or my juice containers)?

Or on the flipside, anything you’ve used that you’d urge other people not to use?

(A few notes for non-soap makers: the soap mix at the point of pouring is about body temperature for “cold-process” soaps so plastic melting is not usually an issue, but it is incredibly caustic at this point, and will react to metals other than stainless steel. It’s poured into the mould when it’s hit “trace”, a gloopy rather than full liquid stage, and left to set in the moulds for a few days, then popped out of the moulds to continue “curing” for a few weeks before use.)

Rosie has emailed:

My partner brought home 3 brand new fibre glass baths (minus handles) which were going to be thrown in the skip. Any suggestions for use and does anyone want them?

That’s just the type of thing I’d want to bring home too – they seem so useful (and so new!) that I’d struggle to resist ;)

They’re bigger than a lot of the things we feature on here so I think the reuses are going to be limited, unless you have a lot of space. Old baths are regularly reused by people with horses or livestock in a field as drinkers, or buried by people wanting a quick and basic pond. I know also some people with large gardens/allotments use them as deep “no dig” raised beds or for containing crops that have a tendency to be invasive (like mint). I’ve also long been interested in aquaponics – I wonder if a bathtub could be used for the water bit of that…

Away from animals and growing, I sometimes play the “what I would do if I had loads of workshop space” game (all crafters do that, right?) and one of the things that would probably feature on my list is a really big dye bath so I could dye long lengths of fabric etc in one go. It’s a will-never-happen thing for me, but I’d probably find a bathtub if I ever did have the space.

If you don’t have room or the need for those type of reuses, someone on your local Freecycle/Freegle group might want them instead. Due to so many people having bath renovations these days, there are a lot of old baths knocking around – but it certainly doesn’t hurt to offer them on there.

Any other suggestions for Rosie either for reusing/recycling ideas or for ways to pass it along?

Good friend of Recycle This Petra has been in touch again:

Here I am again with another item that you hopefully find interesting enough to put on your website.

Still cleaning my cupboards :-) , I now found several out-of-date bottles of contact lens liquid. It’s the storage and insertion liquid, not the soapy cleaning stuff, although it says that it can also be used for cleaning. I can’t find any ingredients, except that it contains certain additives for conservation.

Does anyone know if there’s anything I can do with it. I don’t wear my lenses any more due to too dry eyes, so this is what is left.

As I’m a glasses wearer, I’ve not had enough experience with the liquid to know what it could be used for – I do know that those solutions are sometimes just saline, but I don’t know if that’s the case with Petra’s stash.

Has anyone else had leftover contact lens solution? What did you do with it? Once they’re out of date, can they be used for other not-so-critical things? And if so, what?

As it’s such an unknown area to me, I’d love to hear your ideas for this!

We’ve had an email from Bala:

Can an aftershave which is nearly 3 years old be used as a car freshner??

This sent me down two research routes: 1) do aftershaves/colognes/perfumes expire? and 2) how to make a car air freshener. In answer to the first question, general not: they might lose their top notes or the scent distort in other ways after around five years but otherwise the alcohol will preserve it pretty well, especially if the bottle is pretty full (so there has been less exposure to the air). Some might separate slightly but at three years old, it should be fine.

As for making the freshner, Planet Green suggests a dangly scrap fabric/scrap cardboard/fabric sandwich, but I worry about the suggestion to soak the fabric with the scent – I would have though a few spritzes, refreshed regularly, would probably suffice in a closed car (a little scent goes a long way!).

Anyone got any ideas for making other types of freshner?

Or any other ideas for reusing or recycling old aftershave/cologne?

We’ve had an email from Charley:

I’ve read your pages about reducing toilet paper and sanitary towels. I’m not sure I want to go that far yet but I do want to find an alternative for makeup sponges like for applying liquid foundation. Do you know if there are any recycled sponges on the market or what else can I use?

I’m hoping we’ve got some make-up experts in the Recycle This community — I’ve only worn foundation twice in my entire life so I don’t know much about that sort of thing. It’s an evasive answer but that is one way to reduce using synthetic sponges/foam pads – and other make-up consumables such as packaging: wear less make-up and less regularly. I realise it’s not an answer for everyone but it is something to consider. I think I used to wear make-up out of habit but once I got over the shock of going cosmetically nude, I quickly normalised to not wearing make-up.

Now to Charley’s actual question: with Google, I can find sponge scourers make from recycled but not finer make-up sponges. Anyone got better Google skills or with more cosmetics knowledge, know where/what to look for? You can get natural sponges for applying make-up (which could be composted at the end of the life) but they usually have their own environmental impact. Anyone got any advice on those?

Alternatives: again, possibly not for everyone but switch to a powder foundation that can be applied with a brush – a good quality brush washed regularly will last a long, long time. (On a similar point, I can’t believe I stuck with sponge eye shadow applicators for so long — trained into them by the “free” ones with some shadows I guess — when a shaped brush does a far better job and lasts a lot longer too.)

I know a lot of people make their own make-up removal pads to use instead of cotton wool but has anyone made their own reusable application pads?

Any other suggestions or ideas for Charley to try?