a method of manufacturing a liquid container of plastic coated boxboard , laminated cardboard or the like having a straw therein is disclosed . a method for attaching a holder / straw assembly to a carton in a continuous form , fill and seal process including the following steps : unrolling a rolled sheet material being comprised of a plurality of carton sections , each carton section having a hole formed therein ; sealingly attaching the holder / straw assembly to the sheet material over said hole ; attaching a strip to the holder / straw assembly ; forming the sheet into a columnar sleeve ; sealing a longitudinal seal along the columnar sleeve ; adding the beverage into the sealed columnar sleeve ; forming a top and bottom transverse seal across the columnar sleeve and through the beverage ; cutting each carton from the columnar sleeve ; and forming a parallelepipedic carton having a drinking straw therein .