However, such machines are expensive. Including the UHT sterilizer, the price tag is well over half a million US dollar for the smallest system. If you were to use Tetra Brik or similar packaging then the packaging material cost would likely exceed the product cost inside it. Cheaper packaging material alternative is aseptic multi-layer poly pouches. Three layer plastic pouches are the cheapest and can still give an ambient shelf life of 30 days.
Many people use co-packers to formulate and package the product aseptically.
If a co-packer can package milk aseptically, he can also package soymilk. Aseptic juice packaging lines are not usually equipped with UHT sterilizers. When using salts, ensure these are food grade. If in doubt when a coagulant is food grade or not, play safe by using readily available white vinegar or citric acid. The process cools tofu quickly while removing access coagulant from tofu.