Provided is a storage and delivery system that includes a container containing a stable liquid composition therein for increasing the viscosity of an aqueous liquid or aqueous liquid solid mixture foodstuff and having a viscosity of less than 2000 cP and a water activity of greater than 95%, wherein the composition comprises one or more thickening agents and one or more polysaccharides, and a pump dispenser sealingly attached to the container and having a valve for inhibiting or preventing drying of the composition in the container. Further provided is a method of delivering a stable liquid composition to an aqueous liquid or aqueous liquid solid mixture foodstuff by use of the storage and delivery system. A method for increasing the viscosity of an aqueous liquid or aqueous liquid solid mixture foodstuff by adding the stable liquid composition thereto is also provided.