Why do all squeeze tubes have a square at the top?
Do you mean at the portion furthest from the opening with the cap? Because the tube is filled from the end that is furthest from the opening with cap. Years ago (before flexible plastics existed) all tubes were made from a thick aluminum foil, the cap was put on it, the tube was filled from the opposite end from the cap, and the tube was sealed after filling by folding the open end over a few times and crimping it, which always produced a square end. Now adays with plastic tubing, which is sealed by melting the tube end together you could make it have pretty much any shape, but due to tradition a square end is still used, because that is what customers are used to buying.
ummmm,, is it like putting square peg into a round hole?,,,,lol
