This spout lid adds safety to our Ergo cup. Ergotherapists or household helpers can choose its function : - either anti-spill lid: the hermetic lid helps to limit the liquid spillage when the cup spills. The user must aspirate to drink. - or free lid: simply pierce the top of the lid to create air circulation. The liquid flows on its own without having to vacuum. On the other hand, if the cup is spilled, the liquid spreads more easily. Dishwasher and microwave safe.