How to use buckets on custom fluids?

Hello,

I need some help with some procedure stuff. I am making a custom fluid in my mod, and I can't check the "Check to enable fluid bucket" for the main reason of that I need the bucket with the fluid to be able to be smelted into another item. I hope this makes sense the way I described it. Basically I need to use the bucket of this fluid to make a smelting recipe, but the bucket of this fluid is inaccessible, so I need to make a separate bucket item. I can imitate the behavior of fluid buckets with procedures. However, I need to be able to make a procedure where when I right click on the source block of the fluid with a bucket, the source will disappear, the bucket will disappear from my inventory and I will obtain a custom bucket with that fluid. This doesn't seem to be possible for as far as I can see, not from the custom bucket procedures to the fluid procedures, unless I'm looking in the wrong places?

If anyone can explain to me how I can do this, or how I can use the actual fluid bucket (from the checkbox) or if this is indeed impossible to do, I'd love to hear it! Thanks in advance!