I used iDye Poly. You can find it on amazon or probably other places.
It’s been about a year since I dyed these ones but if I recall, I tossed the dye into a crockpot we have for non-food related shenanigans like dyeing yarn. Let it heat up and then toss the caps in. I used a strainer spoon thing to periodically check the color until it was a shade I was happy with. Then fish them out and rinse them a bunch. After I rinsed them and was pretty sure they were able to be handled by hand, I scrubbed them lightly with a rag to make sure no residue was left.
If you look up any videos on dyeing ABS plastic(or whatever type the caps are made out of) that should transfer to this fairly well.
I used iDye Poly. You can find it on amazon or probably other places.
It’s been about a year since I dyed these ones but if I recall, I tossed the dye into a crockpot we have for non-food related shenanigans like dyeing yarn. Let it heat up and then toss the caps in. I used a strainer spoon thing to periodically check the color until it was a shade I was happy with. Then fish them out and rinse them a bunch. After I rinsed them and was pretty sure they were able to be handled by hand, I scrubbed them lightly with a rag to make sure no residue was left.
If you look up any videos on dyeing ABS plastic(or whatever type the caps are made out of) that should transfer to this fairly well.