An flexible pouch forming apparatus includes a transport means for transporting front and back panel films. A straw hole punch punches a straw hole with predetermined diameter in the front panel film. A seal material transport means unrolls a roll of seal material tape. A temporal hole punch punches a temporal hole in the seal material tape, and a guide means aligns the temporally punched section of seal material tape with the straw hole. A temporal heat sealing device temporally seals a periphery of the temporally punched section of seal tape material to the back side of the front panel film. An alignment station aligns the films to form the pouch body. A final heat seal means applies a final seal over the temporal heat seal at a lower temperature and pressure than the temporal heat seal. A seal means seals the edges, and a finishing station finishes the pouch.