Republic Flour Mills ( RFM ) bought the Cosmos Bottling Corporation in 1989 and were first known as Pop Cola Sizzlers when they joined the Philippine Basketball Association ( PBA ) as an expansion franchise in 1990 . Their first meeting with corporate rival Purefoods Hotdogs takes place on March 1 , 1990 , with Purefoods winning 132-122 . Pop Cola got back at Purefoods in their second meeting on March 13 and scored their first win in the pro league after five losses , defeating the Hotdogs , 138-120 . In the 1990 PBA Third Conference semifinals , Pop Cola now rename Sarsi , were already out of contention even in the series for third place when they played with pride and beat the finals-seeking Purefoods , 138-131 , denying the Hotdogs an outright finals berth and sent them into a playoff game against Shell . The following season in 1991 , Diet Sarsi acquired shooting guard Al Solis from Purefoods by offering him a contract which the Hotdogs did not match . On April 14 , Purefoods center Jack Tanuan joined the Sizzlers . RFM also tried to acquire Hotdogs ' forward Alvin Patrimonio but the PBA office fined both RFM and Patrimonio for tampering . The two corporate rivals battled in the 1991 PBA All-Filipino Conference Finals . The best-of-five series went in all five games with the Hotdogs winning , 107-100 , in the deciding game . Starting the third conference of that year , RFM changed its team name from Diet Sarsi to Swift Mighty Meaty Hotdogs ( or " Swift Mighty Meaties " ) , a brand that their amateur ballclub used during the 1980s and as to rival Purefoods ' " Tender Juicy Hotdogs "
1990 PBA Third Conference
1990 PBA Third Conference
Purefoods–Swift rivalry