Day Bag /deɪ bæɡ/ 1. A flexible container of fabric or nylon with comfortable straps, measuring no larger than 22 inches wide, 14 inches high and 9 inches deep, carrying only the essentials passports or other allowed proof of citizenship, travel documents, completed and signed cruise documents, medication, valuables (jewelry, cash, purse) Disney Cruise Line Packing 101 2. A schoolbag or backpack of everything and anything that is not replaceable and a vacation essential. 3. An enormous load perfect for dad to schlep around all of the fun things you might use the first afternoon of vacation, including but not limited to: swimwear sunscreen cameras chargers phones, anything your kids can't cruise without (favorite snack or their stuffed bear, for example) necessary toiletries (contact lens solution) makeup sail away party items or anything else you don't want tossed around 4. Your lifeline until luggage magically appears midafternoon or early in t...