Leak-proof box

A leak-proof box comprising:

• a main body blank of unitary construction and including a front panel, a bottom panel connected to the front panel, a back panel connected to the bottom panel, a top closure panel connected to the back panel along a hinge line and a closure flap connected to said top closure panel and adapted to be brought into engagement with said front panel to close said box, and glue flaps attached along hinge lines to the ends of said bottom, front and back panels;
• and
• a pair of end panels disposed in communication with said front, bottom and back panels at the ends thereof, said front, bottom and back panel glue flaps overlapping the end panels and secured to the outer surfaces of said end panels, glue flaps attached to said end panels along hinge lines and secured in engagement with the inner surfaces of said front and back panels, sealer flaps hingedly connected to said end panels and adapted to be folded inwardly over said top closure panel to form a leak-proof seal therewith when said closure flap is secured to the front panel, said sealer flaps being connected to their respective end panel glue flaps along lines of cut defining primary seal portions at the upper box corners when the closure flap is secured to the front panel.