For functionality, convenience, and durability its hard to beat a czech tool.  I have always kept one in my right pocket, pipe kit, travel bag, car, locker, glove compartment, cellar, stash, freezer, liquor cabinet, wife's purse, bedside table, seat cushion, gun case, gym bag, cup holder, ashtray, desk, tool box, shoe closet, humidor, storage unit, suitcase, shirt pocket, tobacco tin, pouch, center console, sock drawer, bookshelf, window sill, laundry room...