These are really handy storage containers that stack by screwing one on top of another. We sell them in three different diameters. These containers are large enough to hold just the right quantity of beads for when you are on the move and when you do not want to carry everything! They are really secure because you can screw them very tightly closed, and they?re versatile as they are clear making it much easier for you to find exactly the bead you need. You can even build the stacks larger than 4, 5 or 6 by simply adding more to the bottom of your existing stack! This Medium Stacker has five compartments and is approximately 5cm in diameter. We also stock smaller and larger sizes.