Aluminum beverage can

An aluminum beverage can which comprises:

• (a) a main body portion having (i) the shape of a right circular cylinder, (ii) a given diameter, and (iii) a given wall thickness;
• (b) a bottom wall (i) operatively connected to the main body portion, and (ii) having a wall thickness greater than the given wall thickness of the main body portion;
• (c) a top wall that (i) has a maximum transverse dimension substantially smaller than the given diameter of the main body portion, (ii) has a wall thickness greater than the given wall thickness of the main body portion, (iii) has an outlet opening defined therein for pouring the beverage out of the can, and (iv) is substantially in the form of a geometric shape taken from the class consisting of:
• a polygon having at least four sides, all of which sides are of substantially equal length,
• a Reuleaux triangle,
• an extended Reuleaux triangle,
• a symmetrical curve of constant width derived from a regular polygon having an odd number of sides at least five in number, and
• an extended symmetrical curve of constant width derived from a regular polygon having an odd number of sides at least five in number;
• (d) an airtight closure for said outlet opening, which closure can be opened manually by the user;
• and
• (e) an upper shoulder portion that (i) is operatively connected to the main body portion and to the top wall, (ii) is circular at the bottom, (iii) is substantially the same shape and size as the top wall at the top, and (iv) necks down in size from the bottom of said shoulder portion up to the top of the shoulder portion.