Ya didn't mentions "flasks" so I'll give you some more confusion. I'm all over the place here as I make my own horn flasks. Guess I could say that I have more flasks that money but on a practical matter, For range work, I use two brass tube flasks. One is a Butler Creek with a push button valve and the other is a CVA with the standard gate valve. I mostly shoot loose powder so I also have a shorter field flask from CVA, again brass.
has brought up a good point and that is you can make many of your own support items such as starters, flasks, ramrods, ball bags, nipple picks and even, powder measures. If you like to timker as I do, you can have a bunch of fun with this Great Adventure ....
Be Safe !!!