Abstract: A powder container includes a container body and first and second insert members. The container body has an inner space for disposal of powder therein. The first insert member has a first surrounding wall inserted fittingly into the inner space, and a first bottom wall formed with at least one through hole. The second insert member has a second bottom wall inserted into the inner space and disposed on the first bottom wall, and a second surrounding wall extending upwardly from the second bottom wall and disposed fittingly and disengageably on the first surrounding wall of the first insert member for blocking passage of the powder to an external environment through the at least one through hole.

Abstract: A liquid dispenser includes a hollow shank having top and bottom openings and a fluid chamber. A closure member is sealingly mounted on the top opening. A hollow piston rod has closed and open ends, an inner fluid passage, and an aperture in communication with the fluid passage. A hollow piston is sleeved movably around the piston rod and has a contact part in contact with the piston rod to seal releasably the aperture, and a skirt part. A spring seat has a top rim extending between the skirt part and the closed end to abut against the contact part to seal releasably the aperture, a top blind hole having a cross-section greater than that of the closed end of the piston rod, and a bottom portion. An upper urging unit urges downward the piston. A ball is seated at the bottom opening. A lower urging unit urges the spring seat and the ball against the closed end and the bottom opening, respectively.