I also have to emphasize how important hygiene is!
The careless and ignorant don't post here anymore.
If you don't have basic medical knowledge, you should leave it alone or learn it. Please!
Today I infused 1,5 liter of NaCl into my sac. Just for fun. There was even a five minute window of sunshine. Enough to run out into my garden and make a selfie. (7 C in mid-may!)
I used the last 0.5 L of NaCl, forgot to order in time. I tried to maintain some size with pumping in my IKEA Jar. But I am happy with a still manageable bulge, that is accepted in a general public anyway. Hot pants in hot weather, LOL