Marriott International is expanding an initiative to replace sing-use toiletry bottles of shampoo, conditioner and bath gel in guestroom showers with larger, pump-topped bottles. To date, the hotelier has already rolled out larger bottles at approximately 1,000 properties in North America, and now expects most of its other hotels to make the switch by December 2020.  When fully implemented across the globe, Marriott International's expanded toiletry program is expected to prevent about 5...