I was starting to run out of room in my fly boxes, and being the cheap bastard that I am, was hesitating to fork out big bucks for "real" fly boxes. Then I had an idea. I have a bunch of empty tobacco tins from my pipe tobaccos. Most of these are round tins with a lid that unscrews with a quarter or half twist. They have a rubber seal inside the lid, so they close fairly securely. The only problem is that they are round- fly boxes are generally rectangular. But the more I thought about it, the more it seemed that wasn't really an issue. In fact, I checked all the pockets on my fly vest, and the round tins fit quite well. So I took one of my tins and modified it into a fly box. Rather than lay the flies out in rows like you would in a rectangular box, I made the mounting strips in concentric circles. Here's the first tin. This one is slightly larger than most of the others. Here's the insides. Plenty of clearance between the lid and base, so flies don't get squished. (most of my dry flies were getting crushed in the old box) Nymphs in the base of the tin. Some dry flies in the lid. Plenty more to choose from.