I used to use glass bottles with metal caps. I found that a number of them began corroding. I had to use pliers to get them off the bottle. So, beware.
The local wine supply place has Plastic caps that fit SOME bottles - including the most common Gallon Jugs. I keep a bag of each size and replace any caps that look like they are wearing. The better caps have a poly cone instead of a paper gasket.
Charles MacDonald firstname.lastname@example.org
I still live just beyond the fringe in Stittsville