Cambro has two grades of lids. Neither is polycarbonate. Either can be cut trivially with shop scissors, a utility knife, even a cooking knife. The hole doesn't have to be exact. This isn't rocket surgery! This is the lid I was thinking of: http://tinyurl.com/mgjbq73 That lid is too rigid. it will crack under minimal stress. The soft "transport lids" are your safest bet. Just like one of these: http://cdnimg.webstaurantstore.com/new/70030s_sm.jpg