Container closure system having a cap removable with less than a 45° twist

摘要

A container closure system enabling persons with weakened hands to open or close a container easily. A cap has a skirt. Internal surfaces of the skirt include substantially coplanar rim-engaging members. The container has a neck portion terminating in a peripheral rim. Cap-engaging portions on the peripheral rim engage with the rim-engaging members on the skirt. The rim-engaging members can be ridges or grooves. A slight twist of he cap of only approximately 5°-20° disengages the rim-engaging member and the cap-engaging portions, releasing the cap to the open position.