It's National Coffee Day, but it's important to keep track of how much caffeine goes into your body in a 24 hour period. For most adults, the FDA has cited 400 milligrams* a Bright Pastel Blue Acrylic Stemmed Wine Glass Hydro Flask 32OZ Wide Mouth 2.0 Water Bottle, Straw Lid, Multiple Colors Pacific, New Design Walmart.com Amazon.com: GUSTO [8 oz. 100 Pack Paper Hot Cups, Coffee Cups White (formerly Comfy Package) : Health & Household Amazon.com: Cafe Fill Deluxe 1 Stream Reusable K Cup by Perfect Pod Compatible with Keurig 1.0 2.0 Plus K Duo K Mini K Select K Compact K Elite and Select Single Serve Coffee Makers (1): Home & GLASS BIG BOTTLE 1L (32OZ) Glass Water Bottle: 32oz bkr