HRT Injection Supplies Organizer

HRT Storage Box

EDIT 1 2026-08-31:

I have found that some of my magnets can come loose and drop from their holes in the lid. I printed the lid with its holed face down, so this might be causing the size issue. I recommend using glue, tape, undersizing the hole, or trying to print the lid with the flat face down.

Dimensions

Exterior: 185 mm x 100 mm x 65 mm

Vial Slots: 25.50 mm diameter by 59 mm height

Syringe Pocket: 108 mm x 50 mm x 55 mm

Secondary Pocket: 165 mm x 27 mm x 55 mm

Nearly all of these dimensions can be easily changed in the included spreadsheet in FreeCAD.

Design

The three large holes are made to fit vials, with a cut around the holes to give some space for fingers to pick them up. I have not tested it on real vials yet, so I have intentionally oversized the vial slots.

I have built the syringe pocket to fit syringes I measured myself, to fit Easytouch U-100 0.3cc x 30G x 5/16'' insulin syringes with both caps on. I only measured it to fit one syringe at its widest, but it could probably fit about a dozen.

The secondary pocket is for alcohol pads, band-aids, neosporin, or whatever else you may want. All these items should fit in here, as well as a few extra syringes if needed.

There are large fillets around nearly all corners, so it feels nice on the hand. There is a small indent in the lid to better be able to grip it (the magnets are strong!) and to help prevent your finger from being bitten by the lid (I learned of this design flaw in the earlier lid, painfully).

Assembly

The box shuts closed with 6 mm diameter by 4 mm depth magnets. I used generic neodymium magnets I bought online. I initially wanted to use 6 magnets to close the box, but I found 4 was already sufficiently strong. Regardless, I made both 4 hole and 6 hole models.

Before printing the full box, it might be wise to print the hole testing model and test which size hole your magnets fit in. For me it was 6.3 mm diameter, but different magnets from different manufacturers may require different sizes.

After printing both the body and lid that you prefer, get a large pack of the magnets and push them hard in each hole. Make sure to oppose the sides of the magnets so that each part of the assembly is attracted and not repelled. Putting the assembly upside down on a table and pushing with your palms works too. If there is residue in the hole and the magnet won't fit, scrape it out with a knife or a similar tool. The 4 hole version will need 8 magnets and the 6 hole will need 12.