Foam dispensing container

A foam dispensing container, comprising:

• a cap that is mounted on an opening of a container containing a foamable liquid content;
• a nozzle member having a discharging outlet from which a foam is discharged, that is fitted onto the cap while being allowed to reciprocate in an axial direction;
• an air pump and a liquid pump reciprocated together with the nozzle member;
• an air cylinder that is joined to the air pump in a liquid-tight manner and that pushes air toward the discharging outlet in response to a reciprocation of the air pump;
• a liquid cylinder that is joined to the liquid pump in a liquid-tight manner and that pushes a liquid toward the discharging outlet in response to a reciprocation of the liquid pump;
• a mixing chamber in which the liquid pushed out of the liquid cylinder is mixed with the air pushed out of the air cylinder;
• and
• a porous member that is arranged in the cap to form the foam, and to refine the foam,
• wherein:
• a viscosity of the liquid is 4.5 mPa·s or greater but 12 mPa·s or smaller,
• the air cylinder and the liquid cylinder are individually shaped into a cylindrical member, and a ratio of a square of a diameter of the air cylinder to a square of a diameter of the liquid cylinder is 15.5 or larger but 30.5 or smaller,
• an expansion ratio as a volume ratio between the air pushed out of the air cylinder by pushing down the nozzle member and the liquid pushed out of the liquid cylinder by pushing down the nozzle member is 15.5 or greater but 30.5 or smaller,
• a density of the foam dispensed from the discharging outlet falls within a range of 0.03 g/cm3 to 0.06 g/cm3, and
• a maximum diameter of a bubble in the foam is 450 μm or smaller, and an average diameter of the bubble in the foam is 200 μm or smaller.