A bag-in-box beverage container and dispenser is provided, incorporating an outer box fabricated preferably from corrugated paperboard material, and an inner liquid containing bag, fabricated from a suitable material. The outer box has two pairs of opposing side panels, and at least one diagonal corner panel. One of the side panels has an openable structure for permitting access to the interior of the box, to enable a consumer to grasp and withdraw the dispensing fixture of the inner liquid containing bag, and capture it within the openable structure. In embodiments having more than one diagonal corner panel, at least one of the diagonal corner panels is larger than at least one of the other diagonal corner panels, to permit the container to be tipped onto that elongated diagonal corner panel, for facilitated dispensing of the liquid contained in the inner bag.