One advantage of aligners is that unlike traditional braces, you can eat whatever foods you would like. Before eating and drinking, you should take the trays out and before placing the trays back in your mouth, you should be sure to brush and floss your teeth. We do suggest that patients avoid chewing gum because it can stick to the trays. We also suggest that patients do not smoke with the trays in because it can stain the trays and cause them to discolor.