Dart Vented Plastic Hot Cup Lids, 10 Oz Cups, White. If you want excellent customer satisfaction levels but need to keep your costs low, these high quality, economical hot beverage cup lids should be on your shopping list. The lids are vented to allow the steam from hot drinks to dissipate, so that cups can remain rigid and retain their sturdiness. They're also exceedingly well-fitted to compatible cups, making them very convenient for both your customers and your employees. 1000/Case.