Box-like packaging with dispensing opening and blank for making same

A box manufactured from one material portion, comprising:

• at least three adjoining sidewalls successively connected through fold lines which form edges of the box;
• a bottom panel which closes the box at an underside of the box, the bottom panel connected through a fold line to one of the sidewalls at a lower edge of said one of the sidewalls, the bottom panel being substantially flat;
• a top panel which is substantially flat and extends substantially parallel to the bottom panel, the top panel defining a dispensing opening which can be passed from a closed position to an open position through folding, said dispensing opening comprising a dispensing opening panel connected to one of the sidewalls through at least one curved fold line, the curved fold line creating tension in the sidewall for urging the dispensing opening in one of the open position and the closed position,
• means for sealing the dispensing opening integrally connected with the box;
• and
• means which positively keep the dispensing opening, once it has been opened, in a reclosed position.