@blm1007blm1007 , Hi Barbara, I boil water and pour it into glass water bottles I buy on Amazon, they are great. Been using them for months. They do come with a cap.
I use the acapella rather than the Aerobika, because I find the Aerobika smells too much plasticky and it bothers me. I replace nebbing cups every 3 months, hoping the plastic does not detoriorate too much during that time, replace the tubing every 2 weeks.
I also do keep in mind that plastic is everywhere and it is impossible to avoid it. This is the world we live in.
Best wishes of great health to all of us!