Mess kits aren't clanky if packed right. Ranger bands outside and cotten wool or a bandana inside (if needed) to keep everything snug, slip it into a gallon ziplock to keep everyhing dry, then dump it into a spare watch cap pad it.

Put it in your pouch, and knock your pouch off the table. I bet the mess tin won't clank. <img src="/images/graemlins/smile.gif" alt="" />