Abstract: A cap apparatus includes a cylindrical cap body hingedly mounting a lid thereto, wherein the lid includes a rigid lid arm projecting exteriorly of the lid, including an "L" shaped spring leg arranged to maintain the lid arm in an orthogonal orientation relative to a conduit bore directed through the cap body. A conical piercing cone is mounted to a bottom surface of the lid projecting interiorly of the conduit bore to effect piercing of a seal member of an associated container, wherein the cap body includes a plurality of spring clips arranged to secure the cap body relative to the associated container. A modification of the invention includes the cap member apparatus defined as spaced flanges utilizing a piercing cone coaxially aligned with a presser plate to effect the clamping and piercing of a fluid container therebetween.