These are fun and easy to use. Just toss a handful of chips on or near the hot coals before adding the food. Works great on a smoker or Weber Kettle. If you cook on a gas grill, just wrap the chips in heavy duty foil and place packet near the flame, or add to the smoker box if so equipped. Several flavors to choose from all with unique characteristics, cheap enough to try them all. Each bag lasts several grilling sessions.