NaSUMTUO Men's Sling Bag Headphone Port Waterproof Crossbody Shoulder Bag Outdoor Cycling Messenger Chest Bag Blue

My ex used this when we went to Universal Studios in Florida. It worked well and lasted longer than he ever did. Between the two, I'm glad I kept this one. It held our sunscreen, maybe a pair of sunglasses, some park maps, phone, keys, and could probably hold a small waterbottle(probably). It's cute, handy, and NOT irrational or emotionally unstable. The adjustable strap and padded back do the opposite of obnoxiously making you feel uncomfortable in public. Since we're on the topic, this bag probably holds its liquor better than my ex. As long as it's a flask or a half dozen of those cute inflight shot bottles of Jack, there should be plenty of room. Idk, if for some reason you don't want to swing for a fanny pack, this is the way to go!