We’re all for living your life by the K.I.S.S. principle, and storing your valuables is no exception. These simple leather cases were designed by some clever makers in Japan – the home of stylish minimalism, so no surprises there – with the intention of stashing coins, keys and cards and looking rather spiffy while doing it. Tizz-free and super-light to carry around, they come in three classic tones. Check out more from design studio id inc over here.