A multiple chamber medical fluid bag includes: (i) a flexible enclosure; (ii) a first fluid chamber formed in the enclosure; (iii) a second fluid chamber formed in the enclosure; (iv) the first fluid chamber and the second fluid chamber separated by a frangible seal; and (v) an access port connected to the enclosure, the port imbedded into the enclosure so as to completely surround the access port, the enclosure further configured such that the frangible seal is broken to uncover the access port.