Back in March of 2017 I was modifying a power supply wire to power one of the robots without the need to worry about batteries. I needed to solder a couple connectors. During this time my solder roll kept moving around, I was thinking I should have purchased a device to hold the roll.
Well, who needs to buy a holder when you have Shapr3D and a 3D printer. So I just created one in Shapr3D and printed it with my Makerbot Replicator +.