wsm water pan mini

When I tried my first all-day smoke (see http://tvwbb.com/showthread.php?49344-All-day-smoke-of-an-8lb-pork-shoulder-on-a-wsm-mini-build-This-is-what-happened), the frail pie pan I had been using as my drip pan/water pan tipped over and spilled over half my lit charcoal. This could have ruined...