Sentry Medical Emesis Vomit Bag has a firm polyethylene twist and lock rim to provide easy control and help prevent spillage after use. They isolate splash back and have a graduated indicative measurement system to 1500ml, allowing measurement of contents in the bag. On completion of use, the bag is easily disposed of with no mess. Simply twist the bag and lock into the keyhole slot on the rim. Rims are colour coded red for infection control.