Removable and reusable container closure with stiffening ring

A closure for removable attachment to a container, the container including an opening and a lip, the closure comprising:

• a top defining a cover and having a peripheral edge;
• at least one locking lever including an upper actuation arm and lower locking arm, the lower locking arm having an inwardly projecting locking wedge, the locking wedge having an inclined retention surface defining a locking angle;
• a deformable hinge connecting the top to the locking lever, the hinge attaching to the locking lever at an intermediate location between the upper and lower arms and providing a fulcrum about which each of the locking levers can pivot, the locking levers operative to releasably engage the container lip by radial displacement of the actuation arms to engage and disengage the locking wedges from the lip;
• a plug seal extending downwards from the top radially inward from the locking levers, a sealing surface of the plug seal adapted to contact a sealing surface on the inside of the container lip when the closure is engaged with the container;
• a skirt attached to the peripheral edge of the top and extending downward from the top, the skirt having an upper edge and a lower edge, the skirt comprising skirt portions located on opposite sides of the locking lever;
• and
• a strap located below the locking lever and connecting the lower edges of the skirt portions, the strap forming in combination with the skirt portions a continuous band around a bottom of the closure for providing stiffening of the closure.