Abstract: A refill pouch includes a head member and a pouch member connected with the head member. The head member has a threaded portion and a disc portion formed thereon. The threaded portion has one end connected with a top side of the disc portion. The threaded portion adapts to be threadedly connected with a pump head. The head member has a through hole defined therein and extending through the threaded portion and the disc portion. The pouch member is securely connected with a bottom side of the disc portion. The pouch member has an opening defined in a top thereof and located corresponding to the through hole for communicating with the through hole. The pouch member has a wall thickness gradually decreasing from the top to a bottom thereof.