A package for a medical device such as an intermittent catheter has a case which is closed at one end and open at the other end. A cap is connected to the case by a hinge to permit selectable movement of the cap between an open position, wherein access is provided to the open end of the case, and a closed position, wherein the cap prevents access to the open end of the case. A seal is connected to one of the cap and case. The seal is engageable with the other of the cap and case when the cap is closed to form a barrier that maintains a sterile environment inside the package. The seal can be repeatedly made and broken whenever the user closes or opens the cap, respectively. One of the case and cap has a latch and the other has a receptacle for receiving the latch to releasably retain the cap in a closed position. The latches fit into the receptacle to prevent lateral forces from distorting the cap when the cap is closed. A locking slide may be used to lock the cap to the case.