Hi, I have been using my smoker for the first time today and have used a few self made foil sachets to put on the coals, can't wait until the stainless boxes are back in stock. After they had fulfilled their life for the purpose the contents look like charcoal, admittedly very small bits Is there any useful future purpose for them? What do you do with them? Also, is there any useful purpose for the ash generated by the charcoal? i'm using cocunut husk blocks which burn hotter and longer than normal charcoal but wondering if it's of any use for anything once it's ash. Cheers, Jon.