the lid is difficult to turn so that it is flush with the edge. If you've made the dan, the cup can barely open. I can do it only with rubber gloves. With which I slip not from the plastic of the closure and the force is then sufficient for opening. In a hardware store I have also seen the cup after my purchase. Here seemed to go on and to very simply. It is somehow the sealing rubber. maybe I caught a slightly faulty production. So the cup keeps super warm and super tight and drinking nothing pladdert next. There are 5 star, but the cover is terrible inlet and screwed with my two copies. For 2 star deduction.
