Before you board, go online and order a pack of water. It costs about $5 for a dozen bottles and it’s nice to have in the room. Passengers aren’t allowed to bring on bottles in their luggage (cans/cartons only), so you can’t bring on most water containers. Plus, having some water in the room is nice to keep from having to head to the dining room or buffet to get a drink. It’s always right there waiting for you.