I used water on my first smoke. I made the mistake of reading and following the Weber instructions before finding this board. Living in a city that requires all residents to recycle everything (paper, glass, metal, plastic, food waste, yard waste, etc...), I wasn't sure what to do with the grease-laden water. I decided to let it cool and separate, scraped off the hardened grease into a baggie and into the trash. I dumped the remaining water at the base of a 100 year old cedar tree growing in the yard. I figured that tree had seen much worse than a gallon or two of dirty water in its life. But, that was the last time I used water. I now use a clay pot wrapped in foil. I replace the foil every other smoke (unless I have a large build-up of drippings). Even though I'm still a "nube", I don't plan on ever using water again. As best as I can tell, there appears to be no "up side" as compared to the clay pot method.
FYI, I store the spent charcoal ash in a 5 gallon metal can away from the house. I empty the can into a plastic garbage bag as needed and put it out with the rest of the non-recyclable garbage. If you use nothing but 100% wood charcoal (vs. Kingsford briquets) , you can use the ash in gardens and compost. There may be other chemicals in briquets, so I don't take that chance adding that to a yard or garden.
FYI, I store the spent charcoal ash in a 5 gallon metal can away from the house. I empty the can into a plastic garbage bag as needed and put it out with the rest of the non-recyclable garbage. If you use nothing but 100% wood charcoal (vs. Kingsford briquets) , you can use the ash in gardens and compost. There may be other chemicals in briquets, so I don't take that chance adding that to a yard or garden.