I try to ensure that I use only what I need, for example, I choose to reuse my pen needles and lancets, when given the option when making a clinic appointment over the phone I decline the offer of a letter (unless I need it to show employer to get time off), but that doesn't mean everyone should do the same. For me, it's as much about saving environmental, as NHS, resources.
It's not juts some people with diabetes who want to reduce use of resources - I sometimes help a severely disabled friend when her husband is away - she needs to be lifted by a hoist between bed and chair, and used a urinary catheter. She used to have resusable nightime urine bags, but these are no longer available on prescription, only single use ones. So, her husband and her have adapted a plastic bottle to colelct urine overnight and be washed each morning - clean not sterile approach and care to prevent bacteria going up tubing towards her small bag and body.