A surgical product supply system includes a cart having a first compartment and a second compartment. The first compartment has first, second, third and fourth walls. The first and second walls are constructed of radio-reflective material and the third and fourth walls are constructed of a radio-absorptive material. The first compartment has a first storage area. A first RFID antenna array is attached to the first wall and is positioned within the first storage area. The first RFID antenna array includes a first plurality of RFID antennas. A second RFID antenna array is attached to the second wall and is positioned within the first storage area. The second RFID antenna array includes a second plurality of RFID antennas. The first RFID antenna is offset relative to the second RFID antenna such that opposing central axes of the first and second RFID antennas are not colinear.