126 may be designed with a variation in the length of circumferential shoulder 127 in order to determine the maximum opening angle to which valve 114 can rotate for example if shoulder 127 is longer then handle position stop 126 can rotate less before it hits the edge of truncated rim 125 thereby reducing the opening angle to which handle 130 can become depressed alternatively with a shorter shoulder 127 more rotation of handle position stop 126 is possible on the reverse side of fixed handle position stop 124 there is attached spring 122 which is connected to a spring base 120 having a flat portion 121 which fits from behind into the center of fixed handle position stop 124 and the center of rotatable handle position stop 126 spring base 120 is positioned within base socket 119 that is embedded in base 110 when handle 130 is released after being depressed spring 122 twists handle actuator 150 clockwise back to its original position thereby rotating valve 114 back to its original position and blocking the exit of the stored food referring now to fig3 a b there are shown two identical fixed handle position stops 124 each having a different rotatable handle position stop 126 and 126 u2032 rotatable stop 126 u2032 has a shorter circumferential shoulder 127 than that of rotatable stop 126 circumferential shoulder 127 may be provided in many different sizes and as described above with a shorter circumferential shoulder 127 rotatable handle position stop.