Serving Tray Round Non Skid Overnight Amenities simply turn the control knob sold separately product codes simply turn the control knob to feed fresh water to a chemical mixing system or turn the knob back to fill the sink Vf 71 has a soft feel and is formulated for the high carbon dioxide transmission necessary for maximum produce shelf life The non slip lining on top of this classic tray gives your wait staff peace of mind when navigating a busy restaurant with an order full of drinks and food Avoid troublesome spills that disrupt your dinner service and rack up replacement costs with this handy non skid serving tray