We sail our first cruise as Diamond on Oasis next month. We have always purchased the DBP, but will not this time. Our plan is to bring two bottles of wine, bring bottled water to have in our cabin, drink coffee from Diamond lounge, use our four drink coupons each, and purchase drinks above and beyond that. Expecting to purchase 2-3 additional drinks each per day (using coupons for $13 drinks, and buying a beer or two). We should/could save around $350.