Look for Reynolds "Super Strength" foil. One notch heavier than "Heavy Duty". That's what I use to line the bottom of my smoker box. Use your "Regular" foil for your other miscellaneous kitchen needs (and for your smoker, until you get the heavier stuff). "Super Strength" is probably overkill for most of your foil needs other than your smoker, and wrapping/resting meats, so since I'm very frugal, I like to save money and use regular foil for other things.