Tube Smoker is the top smoker attachment on the market. It makes smoking possible for gas grills. It is used on a gas, charcoal or pellet grills to give food a smoky flavor. You have to fill it up with pellets or soaked wood chips and place it under the grill grates. it’ll burn at under 225 to give you the blue smoke required for great flavor. You can also cold smoke with it, great for cheeses, fish, and to make smoked ice cubes for cocktails.