They're calling it "The Envelope Please" to encourage hotel guests to leave a gratuity for housekeepers. They're small and clear in color because they haven't eaten yet. No one will claim that the TV remote, which is notoriously difficult to clean, is spic and span. A housekeeper may be lifting pounds just to make the bed. The navigation could not be loaded. Many hotels don't provide them with fitted sheets to make it easier. The housekeeper's job must be most thankless job at any hotel. But it has company when it comes to the dirtiest objects in any hotel room.