Packaging for liquid products

A containerization system comprising an outer container, a substantially water soluble inner envelope containing a water soluble or water dispersible substantially non-aqueous liquid, the envelope having a flexible wall which is insoluble in the liquid and a substantially water soluble heat seal sufficient that no insoluble or dispersed residue remains to clog or interfere with agrochemical equipment such as filters or spray nozzles but can withstand the abuse to which the envelope is likely to be subjected to during filling, handling or storage, the liquid comprising an agrochemical, the system further comprising a space between the outer container and the envelope.