Disclosed is to prevent clogging due to the porous material , providing a cap member which can improve the usability of pet drinking device . Between A and mounting cylindrical portion 36 of the waterer body 3 and the water supply port 52 of the water supply tool 5 , I attach the cap body 1 having an insertion opening 15 of the small inner diameter than the outer diameter of the porous material 6 . Even if it is a porous material 6 filled in the water supply device 5 with water W, water supply body 3 with the porous material 6 , it is possible in particular to prevent clogging of the water supply pipe 38 . The drinking water W filled in the water supply device 5 porous material 6 can be suppressed I The clarified water quality deterioration . And with the usable period of the drinking water W can be reduced prolonged possible replacement occurs when such was left for a long time under temperatures higher environment , it is possible to prevent deterioration of quality of the drinking water W. [ Selection Figure Figure 1【課題】多孔質材による詰まりを防止し、ペット用飲料器の使い勝手を向上できるキャップ体を提供する。【解決手段】給水器本体3の取付筒部36と給水具5の給水口52との間に、多孔質材6の外径寸法より小さな内径寸法の挿通口15を有するキャップ体1を取り付ける。飲料水Wとともに多孔質材6を給水具5に充填した場合であっても、多孔質材6による給水器本体3、特に給水管38の目詰まりを防止できる。給水具5に充填した飲料水Wを多孔質材6が浄化し水質の悪化を抑制できる。飲料水Wの使用可能期間を長期化でき交換作業を少なくできるとともに、気温が高い環境下で長時間に亘って放置した場合等に生じる、飲料水Wの水質の悪化を防止できる。【選択図】図1
