So I keep them in cute jam jars. Nice, if it weren't for the fact that I have a lot of different sizes - while I can stash them away quickly, it takes some rummaging to find one complete set.
So I came up with these washi tape dividers - two strips of tape cross wise to create four compartments in the jar. Just the right amount of space to hold the needles upright without any cramming.
Happy knitting!