No one has mentioned this- so I will. They were not very common but a few horns were turned into horn flasks by putting a flask head on the horn. Looks just like a regular powder horn but with the flask head on the tip. If you are worried about the peg not adequately sealing the horn, etc- you could consider a flask horn. Some really cheap horns have a peg with a taper that is too abrupt and doesn't fit in the drilled hole just right but any good horn should not be a problem. Worked fine for hundreds of years. :wink: