Attempting to read it "in context," I am only able to understand it this far:
a) The "hattat" offering is to absolve sin or wrong-doing that is brought upon the entire community by the actions of leaders or priests.
b) A vessel that touches any part of the blood or flesh of the hattat offering "becomes holy" by some interpretations of the Hebrew phrasiology, or "must be in a holy state" by other interpretations, and then "must be kept apart."
c) This particular offering appears to be the "holiest holy-portion" therefore apparently the scouring and rinsing of the copper or "brazen" vessel to purify it may be so that no remaining part regardless of how scant will come in contact with some other less holy offering if the vessels should get mixed up in a subsequent nomadic move.
d) In the context of (c) I can see the "non-dietary" reason for destroying a porous clay vessel.
Other than that scenario, I am at a total loss for an explanation.
[This message has been edited by Abshalom, 12-08-2003]