Patent ID: 8302795

Claim:
A cap with a box of powder material for preparation of beverages, the cap being mounted on a bottle containing a first substance and closing the bottle, and substances contained in the bottle and the box of the cap are directly mixed before use, said cap comprising a cover, a tube having a lower half including a double cylinder, the double cylinder including an external cylinder and an internal cylinder connected together, an internal shell of the external cylinder having threads for winding the cap on an opening of the bottle located below the cap, the internal shell of the external cylinder having flexible teeth for preventing winding off of the cap from the bottle, a top of an external shell of the internal cylinder having a sealing surface by which the cap seats tightly on an upper part of the opening of the bottle, a bottom-side of the internal cylinder being closed with aluminum foil, impermeably glued to an edge of a part of the internal cylinder, the internal cylinder having a slant damper in a form of an ellipsoid plate of uniform thickness, developed from a section of an internal shell of the internal cylinder by a plane at a sharp angle in relation to a horizontal plane closing the internal cylinder, the slant damper being inseparably connected by a hinge bending joint to the internal shell of the internal cylinder, and the slant damper having, on a lower part a thorn for breaking through the aluminum foil, and the slant damper, in a final open position, being held by two teeth, arranged on the internal shell of the internal cylinder and the slant damper being inseparably connected to a one-arm vertical flexible lever in a form of a support of uniform thickness and changeable cross-section, a top of the slant damper having a rectangular cross-section, and on one half of an internal plane of a bottom surface of the cover is located an internal, vertical centric semicircular tang and a partly concentric external, vertical semicircular tang, an end of the external tang being bent towards a central axis of the cover, a channel located between the internal tang and the external tang for receipt of a top of the lever, and a vertical barrier located on the external tang for engagement by the top of the lever.