The beverage card can be a little confusing. No, it does not cover every soda that your kids order, namely the dining room, or soda bought in the shop. The 15% gratuity is added to beverages on your sail and sign card. It was originally that you could only get fountain drinks in a glass, but policies on this are changing constantly. We were on Princess recently, and they had a "sippy mug" type of thing. You can get drinks free around the buffet and pool area, iced tea, coffee, juice, lemonade and water from the
fountain. Bottled water you must pay for. We take bottled water with us, and then refill when needed to have something to drink when you go ashore. Don't drink the water anywhere off the ship, or have a drink that has ice cubes either. Many people don't think of that, and end up paying the consequences. Happy sailing!