The Dart 16RCLBLK Optima disposable black plastic drink-through dome lid comes in 10 packs of 100 lids and is suitable for use with 12 oz., 14 oz., 16 oz., 20 oz., and 24 oz. Dart J16, U16, and X16 series hot cups. The lid has a locking tab with a drink hole plug to help seal the cup and prevent spills, leaks, and splashing and to slow the loss of heat from the beverage. The lid has a locking post with side latches to hold the tab down when the drink hole is open. Lift and lock instructions are embossed on the lid to facilitate the use of the locking tab. The lid has a raised drinking spout to provide space between the lid surface and the nose for comfort. It has a dome to provide space beneath the lid for beverage foam and toppings. A caution statement is embossed on the lid to help create awareness of the beverage's hot temperature. This lid is stackable for compact storage.

Dart manufactures disposable products for the food service, retail, and food packaging industries. The company, founded in 1937, is headquartered in Mason, MI.