Thanks for all the good feedback. DH also likes the door curtain. I have enough duvets to make the matching curtains (it was a very random purchase) but all the carefully chosen plans for decoration in the study and living room that I have would go flying out of the window. On the other hand, they are really just thought experiments. I am considering my options.
Back on 3rd January I made the diffusers. There is some nice scent coming from them, but it has faded a great deal. I still get occasional flashes of the bergamot drifting past, but I am not sure that they are worth it.
The big question comes down to this - do I want to waste the fifty diffuser reeds left over (60 for £2.49) or do I want to spend another £10 on cheap vodka which will probably make several more? I have the essential oils in. I was thinking that I could use small bottles that have held sauce instead of the Merlyn bottles. Or I could try some of the flute type glasses, as a narrow opening is supposed to be important. I have one or two in the back of the cupboard, and I have a trip to some charity shops planned. I may be able to pick up a narrow necked bud vase, or a brandy glass. I shall keep my eyes open.
I would put some of the tumbled chip gemstones in, top up with the scented mixture and insert the diffuers. The chip type gemstones would be, in this thought experiment, from a necklace from a charity shop. You can find them loose on eBay as well.
It comes down to, do I want to spend more money on something that isn't working brilliantly? Once I have made the initial outlay of stones and clear glass containers, I think that the £10 of vodka and occasional £1.60 or so of essential oil will last a long time and I do like the scent, but it is a scent that you brush past, rather than scenting the whole room. I could just throw out the reeds that I have left over, but that goes against the grain with me.
I think I shall see what I find in the charity shops next week. If I can get what I want for less than £5 then I may consider it. I will update if anything happens.