Appliances and containers for preparing a beverage in a transparent chamber

An appliance for preparing a beverage, comprising:

• a housing;
• at least one source of liquid;
• a chamber for preparing the beverage,
• wherein the chamber is a disposable container comprising an exterior casing, and a first chamber and a second chamber,
• wherein the first chamber comprises a concentrated beverage, and the first and second chambers are divided by an opaque partition,
• and wherein the exterior casing is adapted to resist the transmission of light into the disposable container;
• a dispenser for dispensing the prepared beverage,
• wherein at least one portion of the exterior of the appliance is transparent, and the at least one transparent portion of the exterior of the appliance comprises a transparent wall of the chamber for preparing the beverage,
• wherein the liquid and the concentrated beverage are mixed in the first chamber, and the transparent portion is a transparent wall of the second chamber, and
• wherein the at least one source of liquid is a carbonated liquid.