The present invention comprises a pot unit, which is composed of an inner pot having a concaved receiving region, an outer pot supporting the inner pot, a hollow space region defined between the outer pot and the inner pot, and a water seeping hole communicating from the receiving region to the space region, wherein the contact position between the inner pot and the outer pot is sealed, and the water seeping hole is configured for mounting and assembly of a fastener a fastener, which is made of deformable material and comprises an upper sleeve, a lower sleeve, a hollow position limiting portion communicating the interior of the upper sleeve to the interior of the lower sleeve, and a surrounding shoulder connected between the upper sleeve and the lower sleeve, wherein the upper sleeve and the lower sleeve are tightly fitted around the water seeping member, and the outer periphery of the upper sleeve or the lower sleeve is configured with at least one convex ring for providing leakage prevention effect while pressing the fastener onto the inner wall of the water seeping hole, and the surrounding shoulder is used for depth control of the fastener while assembling into the water seeping hole, and a hollow position limiting portion is configured along the axis of the fastener for receiving and assembly of the water seeping member and, a water seeping member, which is penetrated and assembled within the position limiting portion of the fastener, so that the position limiting portion may surround the periphery of the water seeping member.本發明包括有一盆體單元,其係由一具凹陷狀容置區域的內盆體、一支撐內盆體用的外盆體、一夾置於外盆體與內盆體之間的中空狀空間區、以及可由容置區域連通至空間區的滲水孔;其中:內盆體及外盆體的接觸位置係呈密閉狀,且滲水孔係可供固定件安裝組設之用;一固定件,係為具有可變形材質所製成,且固定件包括有上套圍部、下套圍部、一連通上套圍部內部至下套圍部內部的中空狀限位部、以及連接於上套圍部及下套圍部間的環肩部所組成,而該上套圍部及下套圍部係緊密套置於滲水件周側,且上套圍部或下套圍部的外周圍設有一個以上的凸環,以作為固定件擠壓至滲水孔內壁面時而具有防漏功效;又,環肩部係作為固定件在組設至滲水孔內的深度控制之用;另,固定件的軸向線方向設有一中空狀限位部,以供滲水件容置組設之用;一滲水件,係貫穿組設於固定件的限位部內,且使限位部能包圍於滲水件周側。1‧‧‧盆體單元10‧‧‧內盆體11‧‧‧外盆體12‧‧‧空間區13‧‧‧容置區域14‧‧‧滲水孔2‧‧‧固定件21‧‧‧上套圍部22‧‧‧環肩部23‧
