Drink can lid with closure cap

A drink can comprising:

• a lid that is fastened to a cylindrical can body by a flanged rim;
• said lid having an off-center opening and a closure cap that covers over the entire lid and is mounted on the flanged rim in a rotatable but non-removable fashion, by a fixed marginal bead;
• the opening in the lid being surrounded by an annular bead having essentially conical bead flanks;
• the closure cap having an off-center opening that can be brought into alignment with the opening in the lid;
• the closure cap having at least one off-center annular bead that is directed towards the lid and having essentially conical bead flanks;
• the closure cap including with the at least one off-center annular bead, in each case starting from the inner bead flank, a flat sealing ring adjoining, and, given an appropriate rotational position of the closure cap, resting in a leaktight manner under pretension on an apex of the annular bead that surrounds the opening in the lid;
• wherein if in the closure cap only one at least one off-center annular bead is constructed, this at least one off-center annular bead surrounds a closed region that is formed by the sealing ring and a deformable bulge that is located within the sealing ring;
• in the closed position, the annular bead in the closure cap surrounding the annular bead in the lid that surrounds the opening in the lid, and the sealing ring resting in a leaktight manner under pretension on the apex of the annular bead that surrounds the opening in the lid;
• wherein in order to open the drink can for the first time, the bulge can be pressed in from its convex position into a permanent concave position, it being the case that, during the transition from the convex into the concave position, the sealing ring coming briefly free from the apex of the annular bead that surrounds the opening in the lid, in order then to rest again with pretension on the bead apex in the concave position;
• the annular bead in the closure cap projecting in the direction of the lid, beyond the sealing ring;
• and
• the region of the closure cap in which an annular bead is constructed can be deflected resiliently with respect to the fixed marginal bead of the closure cap.