Anti-skid mats are made of a fairly pliable rubber material that sits inside bar trays to add a little traction to the usually slick surface. This can do wonders when it comes to keeping pint glasses and other glassware a little more stable on the bar tray. Choose from different diameters to make sure that you match up the anti-skid mat to the bar tray size, or at near as close as possible. These anti-skid mats are a neutral brown color. They are easy to wash and require little maintenance.