STERILIZER BOX enna box, which also serves to transport it and always have a spare cup on hand. TWO CUPS IN EACH PACK so you can always have a replacement. It has a GUIDE THREAD to know that it is well placed and to be able to locate the base of the cup, as well as to remind us that we are wearing it and not forget to remove it. MADE IN SPAIN with medical grade LIQUID SILICONE, which makes it softer and more comfortable.