Abstract: An apparatus includes two or more sterile environments, each of which is at least partially enclosed by a wall member. A portion of the wall member of at least one of the environments is joined to a portion of the wall member of another one of the environments and the wall members at or within the joined portions are capable of being opened to connect the sterile environments. At least a portion of one or more of the surfaces that form the joined portions is provided with a bactericidal substance to sterilize the joined portions before they are opened. The wall members are preferably joined by an adhesive in which the bactericidal substance may be impregnated. The sterile environments may be an operating enclosure, a window unit or a carrier containing surgical instruments, fluids, medicines, a glove, blood or saline.