Karat® Hot Cup Lids are compatible with Karat® Hot Cups. Durable polypropylene, heat-resistant hot cup lids. Made of high-quality material and are recyclable as well. Lids are much more heat resistant than PS lids. Sipper Cup Lid—Fits hot cups with 90 mm rim diameter. Fits: 10 oz to 24 oz Hot Cups; Material Type: Plastic; Material(s): Polypropylene; Color(s): White.