A refillable spray dispenser comprising a top compartment (6120) and a bottom compartment (6130) separated by a roof (6140); an exhaust hole in the bottom compartment (6130) and a passage extending from the exhaust hole to the bottom opening, and an upper sealing ring. A valve comprising a valve body and a valve core piston (6270), wherein: the core piston (6270) has a stem (6271) firmly inside the valve body and a head (6274) outside the valve body, and a valve groove extends along a portion of the stem (6271) that is inside the valve body; the upper sealing ring (6252) blocking the exhaust hole when the valve is at rest. Pushing a bottom sealing ring (6256) allows the bottom sealing ring (6256) and the valve to be moved toward the roof (6140), fluid to pass through the valve groove and the head groove into the top compartment (6120).