Let me share what happened last night, so you will not make the same mistake I did.
I was washing the dishes last night. I have this neat Ninja blender that David and Meg Suell left for me. It has a set of removable blades, which are attached to a plastic shaft that attaches to the motor. I was also washing a plastic measuring cup. I put the blade in the cup and started washing the bowls.
When I returned to the blade in the cup, I discovered that the blades had lodged inside the cup. The more I tried to pull the blades out, the more they got embedded in the cup.
Eventually, I took a lighter and melted the outside of the plastic measuring cup, until I could break the cup and free the blades. I threw the measuring cup away.
So don't do what I just did.