There was an interesting story in the New York Times' Dining section this week about single purpose (expensive) tools that sit in a corner or drawer and never come out. I'm guilty myself. From Rome I have this beautiful, folding porcini knife. On the side there is a measuring grid and at the back there's a little brush. I admit to being an obsessive knife guy but I'm probably 1500 miles from the nearest porcini. What do you have?