For myself, I've always gone with a little bigger, especially for cooking over wood. A wider can/pot allows for a little wider area underneath for fuel,and/ or more stability. Since I always nest things inside the can, I don't begrudge the small amount of extra weight. The coffee cans usually come with a plastic lid, which is a great thing for packing. You can wrap a piece of foil around the can, put a piece over the top, snap the lid back on and rehydrate food right in the can. I'm very biased though, like Phat, I bite and bark until I've had 2 cups of coffee in the morning.