A closure comprising a. an upper wall defining an opening; b. a cylindrical snap-on pipe depending from the upper wall and extending axially to a bottom end, c. the cylindrical snap-on pipe including at least one resistance recess at the bottom end thereof; d. the cylindrical snap-on pipe further including at least one thread on an inner wall thereof; e. the cylindrical snap-on pipe defining opposing first and second walls of the resistance recess; f. the first and second resistance recess walls having gradients wherein the gradient of one of the first and second resistance recess walls is smaller at least at one point than the gradient on the other of the first and second resistance recess walls (46, 44) at a point lying at the same axial height, the resistance recess wall with the higher gradient for contacting a forcing element of a container, and for resisting turning of the closure in a closing direction and the opposite resistance recess wall having a gentler gradient such that when the closure is turned in the opposite, opening direction, contact between the gentler gradient of the second resistance recess wall and the forcing element can force the closure axially upwardly relative to a container neck; characterised in that g. the bottom end of the cylindrical snap-on pipe comprises a guidance recess for lowering the cylindrical snap-on pipe thread relative to the container neck, guidance recess comprises in the closure opening direction a first guidance recess wall with an upward gradient and a second guidance recess wall having a downward gradient whereby in the direction of rotation to unscrew the closure upon contacting the first guidance recess wall with a forcing element on the container the cylindrical snap-on pipe can be lowered relative to the container and when contacting the second guidance recess wall with the forcing element the cylindrical snap-on pipe is raised relative to the container, and wherein when the closure is rotated in the closing direction, the forcing element encounters the upwardly extending second guidance recess wall which permits the cylindrical snap-on pipe axially to lower itself toward the container neck and when the side wall and/or the top of the forcing element encounters the first guidance recess wall the snap-on pipe is raised relative to the container neck and then the top of the forcing element can contact a section of the bottom end of the snap-on pipe and upon further rotation, the forcing element reaches the second resistance recess wall and the snap-on pipe can move downwardly as the forcing element is accommodated within the resistance recess, and when the forcing element encounters the steep first resistance recess wall the closure cannot be rotated any further. a. an upper wall defining an opening; b. a cylindrical snap-on pipe depending from the upper wall and extending axially to a bottom end, c. the cylindrical snap-on pipe including at least one resistance recess at the bottom end thereof; d. the cylindrical snap-on pipe further including at least one thread on an inner wall thereof; e. the cylindrical snap-on pipe defining opposing first and second walls of the resistance recess; f. the first and second resistance recess walls having gradients wherein the gradient of one of the first and second resistance recess walls is smaller at least at one point than the gradient on the other of the first and second resistance recess walls (46, 44) at a point lying at the same axial height, the resistance recess wall with the higher gradient for contacting a forcing element of a container, and for resisting turning of the closure in a closing direction and the opposite resistance recess wall having a gentler gradient such that when the closure is turned in the opposite, opening direction, contact between the gentler gradient of the second resistance recess wall and the forcing element can force the closure axially upwardly relative to a container neck; characterised in that g. the bottom end of the cylindrical snap-on pipe comprises a guidance recess for lowering the cylindrical snap-on pipe thread relative to the container neck, guidance recess comprises in the closure opening direction a first guidance recess wall with an upward gradient and a second guidance recess wall having a downward gradient whereby in the direction of rotation to unscrew the closure upon contacting the first guidance recess wall with a forcing element on the container the cylindrical snap-on pipe can be lowered relative to the container and when contacting the second guidance recess wall with the forcing element the cylindrical snap-on pipe is raised relative to the container, and wherein when the closure is rotated in the closing direction, the forcing element encounters the upwardly extending second guidance recess wall which permits the cylindrical snap-on pipe axially to lower itself toward the container neck and when the side wall and/or the top of the forcing element encounters the first guidance recess wall the snap-on pipe is raised relative to the container neck and then the top of the forcing element can contact a section of the bottom end of the snap-on pipe and upon further rotation, the forcing element reaches the second resistance recess wall and the snap-on pipe can move downwardly as the forcing element is accommodated within the resistance recess, and when the forcing element encounters the steep first resistance recess wall the closure cannot be rotated any further.