A container formed of a blank (2) consisting of first, second, third, fourth and fifth panels (4, 6, 8, 10, 12), respectively. The first, second, third, fourth and fifth panels (4, 6, 8, 10, 12) include respective top sealing sub-panels (14, 16, 18, 20, 22), of an outwardly bowed form bounded inwardly by respective score lines (15, 17, 19, 21, 23). The first, second, third, fourth and fifth panels (4, 6, 8, 10, 12) also include respective bottom sealing sub-panels (24, 26, 28, 32, 34) of a per se known form. The first and third panels (4, 8) also include respective intermediate panels (34,38) which are each uninterrupted by score lines, except that one intermediate sub-panel (38) is formed with a through hole (40) for receiving a pour spout fitment. The second and fourth panels (6, 10) include respective intermediate sub-panels (36, 40) which are divided by score lines into respective sub-sub-panels (42, 44), identically as between the sub-panels (36, 40).