This model is a Gridfinity bin for storing the common retangular Hydrometers popular in the 3D printing community for monitoring humidity. The bin is a half height 3 by 3 Gridfinity bin with room for 8 Hydrometers and 9 of the LR44 batteries that are used in these Hydrometers. There also a 3d printed pick tool and place for it in the bin that helps you to remove the LR44 batteries from the bin, from the Hydrometers or both.

The bin has finger pulls for removing Hydrometers, but if your fingers are not small enough or you have trouble, you can also use the same pick tool to remove them instead. There is also a dedicated finger pull cutout to help remove the pick tool from it's holder.

The bin has been designed so that when full, you can still stack another gridfinity bin on top of it, and none of the items stored in it stick up enough to prevent this stacking. This does mean that some people might find the items fiddley to remove, but that is how I wanted it for something that is not accessed very often and will be stored under other bins most of the time, without having to move the bin size up to a 4x3 gridfinity bin where things might be more accessable.