Kas - basque origin soft drink producer
"Kas is the brand name of soft drink produced by PepsiCo. It is made in grapefruit, orange (yellow), lemon (greenish-yellow), bitter, and apple flavors. Kasfruit juices are also offered in multiple flavors. Kas is available in Spain, Mexico and France, and was available in Portugal, Brazil and Argentina during the 1990s. - Wikipedia"