Allows extra space for froth or whipped cream for gourmet hot beverages. The inner ring reduces pop-off incidents, providing a more secure lid fit and reducing dribble at the rim and cup seam. Fits: 8 oz Hot Cups; Material(s): Polystyrene; Color(s): White; For Use With: 378RC-J8484; 378PLA-J7234; SC378-3008; 378SH-0041; 378SI-0041; 378HJZ-00055; 378JZ-00055; 378HS-0029; 378MS-0029; 378HSM-J8000; 378SM-J8000; 378HW-2050; 378W-2050; OF8BI-0041; OF8PLA-J7234; IC8-J8000; IC8-J7534.