Modular Button Battery Cell Storage

A modular storage solution for coin/button battery cells.It is made up of a number of layers, each layer specializing in a particular size of battery. Each layer has a threaded top and bottom so any number of layers in any order can be assembled together. There is also a base which hides the thread on the bottom most layer and a top. Each layer has been designed so that the batteries do not fall out of the slots if the storage is inverted, each layer has a knurled outer section for ease of undoi