Cross-cut slot simplifies straw insertion. Cup-hugging lip ensures a tight, secure fit. Slightly raised rim allows you to stably stack one cup upon another. Fits: 7oz PETE Cold Cups; Material(s): PETE; Color(s): Clear; For Use With: SOLO Cup 7oz Ultra Clear PETE Cups; SOLO Cup 9oz Tall Ultra Clear PETE Cups; SOLO Cup 7oz Galaxy Translucent Plastic Cups; SOLO Cup Party Plastic Cups.