I've been using a bottle of bacteriostatic water that expired in May 2018, although it was opened before that and I'd rather not continue to use it. I've looked online and it's just under $12 shipped. GoodRx has coupons for CVS and RiteAid, but neither of them can order it. Does anyone know what the problem is? There was something mentioned back in 2018 about a shortage, but is that still going on? Why is it so expensive? Apparently, after it's opened, even if it states "multi use," it expires 28 days after opening. I've had some weird skin conditions, and I wonder if this has something to do with it.