DrinX Placemat Lunch Bag Light Gray/Torqouise/Yellow. The FlatBox DrinX Lunch Bag (with built in bottle holder) is â??The Placemat That Carries Your Lunchâ??. FlatBox DrinX Lunch Bags are 100% machine washable and the patented unique design easily unzips to a placemat, providing you with a clean and healthy eating surface. Flatbox is the only lunchbox that effectively addresses consumers' growing concerns of food allergies and cleanliness.