There is a post somewhere on here about that exact thing....from what I understood that there is a price limit on the coupon....I am not sure how much though....I think one of the benefits is the tip is included on the coupon, compared to when you don't use one it is automatically added to your bill....I believe the general opinion was it is worth it depending on what you drink....would help to know what the price limit on the coupon is worth?
I know that we can bring "fine wine" on board, I wonder if that means a box of wine? A box would last us the whole cruise and save us an unbelievable amount on drinks!
If you use the drink coupon your drinks come to $4.87 each inclusive of the tip. Someone posted that if the drink is more expensive you have to use two coupons instead of one. The carnival website does give drink prices. It seems that most of them are $3.95 or less, except for the frozen drinks. Even paying the 15% on top of that is brings it to $4.54 per drink.