My thoughts on bio bag
This carton had the ability to be completely airtight which was accomplished by using a system of plastic and aluminum coated paperboard combined with an aseptic filling system. The companies name: TetraPak, was derived from the fact that these cartons were tetrahedral from "four" in the Greek language. In nineteen sixty three (1963) the company introduced another one called TetraBrik, a rectangular cuboid carton. Tetrawedge which was wedge shaped packaging and tetraprisma which was a round octagonal packaging along with tetrafino which was a pouch shaped packaging were other cartons that were launched. Some other tetra bio bags include tetrarex(gable top), tetratop(paper and plastic moulded in one) and the now discontinued tetraking.