A container closure for powdered material with improved sealing of its measuring chamber that is capable to deliver predetermined amount of a powdered material; - where said closure consists of a cap and pivotally movable top that is nested within the said cap via pair of side pins which are inserted into bores already formed in reinforced portions of the said cap; characterised in that - the measuring chamber is formed by four walls: a front chamber wall connected with two side chamber walls, said side chamber walls are connected with a rear chamber wall and situated at a horizontal portion of the said cap; a bottom chamber wall that is situated in the way that connects both side chamber walls and front chamber wall, thus an opening is formed between the bottom chamber wall and the rear chamber wall to allow the passage of the powdered material; and - the measuring chamber is enclosed by the top inner surface of the pivotally movable top; two front cap walls, two rear cap walls, a front cap tooth and a rear cap tooth are formed on the said inner surface of the pivotally movable top; - the pivotally movable top in its closed position is parallel with the horizontal portion of the cap and the powdered material can pass through the opening formed between the bottom chamber wall and front cap tooth filing up the measuring chamber, while rear cap tooth gets in contact with the rear chamber wall sealing the connection between pivotally movable top and the cap; - the pivotally movable top while in its open position, achieved by pressing an engaging portion towards the cap, opens the discharge orifice formed between front chamber wall and top inner surface, while the front cap tooth gets into contact with the bottom chamber wall resulting in sealing off the measuring chamber with powdered material situated in it from the powdered material situated in the rest of the cap; and in that said improved sealing of the measuring chamber is achieved in a way that: - each side chamber wall is sandwiched between one of the rear cap walls from the inner side of the chamber and one of the front cap walls from the outer side of the measuring chamber, ensuring that powdered material stays within the measuring chamber without leakage, while pivotally movable top is in closed position; and - when pivotally movable top is switched to its open position, said sealing formed by the rear cap wall, side chamber wall and front cap wall allows powdered material to leave the measuring chamber through the discharge orifice only. - where said closure consists of a cap and pivotally movable top that is nested within the said cap via pair of side pins which are inserted into bores already formed in reinforced portions of the said cap; characterised in that - the measuring chamber is formed by four walls: a front chamber wall connected with two side chamber walls, said side chamber walls are connected with a rear chamber wall and situated at a horizontal portion of the said cap; a bottom chamber wall that is situated in the way that connects both side chamber walls and front chamber wall, thus an opening is formed between the bottom chamber wall and the rear chamber wall to allow the passage of the powdered material; and - the measuring chamber is enclosed by the top inner surface of the pivotally movable top; two front cap walls, two rear cap walls, a front cap tooth and a rear cap tooth are formed on the said inner surface of the pivotally movable top; - the pivotally movable top in its closed position is parallel with the horizontal portion of the cap and the powdered material can pass through the opening formed between the bottom chamber wall and front cap tooth filing up the measuring chamber, while rear cap tooth gets in contact with the rear chamber wall sealing the connection between pivotally movable top and the cap; - the pivotally movable top while in its open position, achieved by pressing an engaging portion towards the cap, opens the discharge orifice formed between front chamber wall and top inner surface, while the front cap tooth gets into contact with the bottom chamber wall resulting in sealing off the measuring chamber with powdered material situated in it from the powdered material situated in the rest of the cap; - each side chamber wall is sandwiched between one of the rear cap walls from the inner side of the chamber and one of the front cap walls from the outer side of the measuring chamber, ensuring that powdered material stays within the measuring chamber without leakage, while pivotally movable top is in closed position; and - when pivotally movable top is switched to its open position,