Reply to vanestag
Hello Vanestag.
The answer to your question is that in the UK we tend to be on the NHS (National Health Service) which, as far as I am aware, will supply (more or less) as many sleeves and bags as each individual needs (without charge).
That said, I use my own (DIY) baseplates, which means that I can get several months of wear out of one sleeve before having to change to another. I used to get them to last over six months when I was soaking them in bleach to get the stains out. But, more recently, I have been discarding them when they get too stained and they tend to last about 3 months. As there are 12 in a BOX I have only ever had one box to date and I estimate that the remainder of sleeves will probably last me until 2026.
As for bags, which are 2 piece. The same principle applies in that I attach them to my own baseplates and they last about a month, Largely because I irrigate and, as yet, have have no output land in the bags. The problem with the bags is that they are flimsy and split where they are moved on and off the baseplate (You can see a picture of this splitting on my profile).
I often feel sorry for residents of the USA who do not seem to have a system of medical care that is paid for by taxation and is free at the point of need.
Best wishes
Bill