Flush-O-Matic 9000
thingiverse
One of my coworkers at work asked me to whip up a holster for 10cc flushes, so I sat down for 10 minutes and knocked out the FLUSH-O-MATIC 9000!!! It will securely hold 4 17.8mm flushes in a pocket, though you may need to mess around with the scale to get it just right. I imagine you could resize it to make it fit almost any size syringe.
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