Alcohol on a cruise is generally treated as a "premium" add-on and is not included in the base fare of most mainstream lines like Royal Caribbean or Carnival. Most passengers choose to buy a Daily Beverage Package, which for a flat fee (typically $60–$100 per day) allows for unlimited drinks up to a certain price point. If you don't have a package, you pay per drink, with prices similar to land-based bars plus an automatic 18% to 20% gratuity. Cruising has strict "bring-on" rules: most lines allow you to bring one 750ml bottle of wine or champagne per person in your carry-on during embarkation, often subject to a "corkage fee" (approx. $15–$25) if consumed in a restaurant. Bringing your own beer or hard liquor is strictly prohibited, and security will confiscate "hidden" alcohol found in luggage. Any alcohol purchased in a port-of-call or the ship's duty-free shop is held by the crew and returned to your stateroom on the final night of the cruise to be taken home.