Mustard, ketchup and similar pasty matter is metered out and served from a dispenser, including a container and an attachable outlet pipe of flexible material enclosing a valve member. The container has one plane end face, permitting it to stand upright during storage, and an opposite, truncated end face, to which the outlet pipe is attached at a threaded portion. A restriction at the truncated end face defines a seat for a valve member, which includes an upper big body and a lower small body in...

Processes for the preparation of stock solutions for use in medical treatments such as dialysis including the steps of providing a flexible bag containing powder components of the stock solution, supplying water to the flexible bag to provide the stock solution, and dissolving the powder in the water within the flexible bag by stirring the powder by application of a magnetic field to a magnetic stirrer disposed within the bag.