A package for a medical device comprising: a tray having a top surface, a bottom surface, a proximal end, a distal end, and first and second lateral sides (66, 68) that extend between the proximal and distal ends (62, 64); said tray having elements projecting from said top surface; a retainer lid secured to said tray for covering said top surface of said tray at the distal end of said tray; characterised in that the package further comprises either: (i) a retainer sleeve having a distal end and a proximal end, the distal end of said retainer sleeve being wrapped around said top and bottom surfaces (72, 74) of said tray and being secured to said tray by said retainer lid, the proximal end of said retainer sleeve including a top panel that covers said top surface of said tray at the proximal end of said tray, wherein said top panel of said retainer sleeve has a free edge that is adapted to flex away from said top surface of said tray; or (ii) a cover flap having a proximal end, a distal end, and a lateral side extending between the proximal and distal ends, the lateral side of the cover flap being secured to one of the lateral sides of said tray and the distal end of said cover flap being secured to said tray by said retainer lid, wherein said cover flap covers said top surface of said tray at the proximal end of said tray, wherein said cover flap has a free edge that is adapted to flex away from said top surface of said tray. a tray having a top surface, a bottom surface, a proximal end, a distal end, and first and second lateral sides (66, 68) that extend between the proximal and distal ends (62, 64); said tray having elements projecting from said top surface; a retainer lid secured to said tray for covering said top surface of said tray at the distal end of said tray; characterised in that the package further comprises either: (i) a retainer sleeve having a distal end and a proximal end, the distal end of said retainer sleeve being wrapped around said top and bottom surfaces (72, 74) of said tray and being secured to said tray by said retainer lid, the proximal end of said retainer sleeve including a top panel that covers said top surface of said tray at the proximal end of said tray, wherein said top panel of said retainer sleeve has a free edge that is adapted to flex away from said top surface of said tray; or (ii) a cover flap having a proximal end, a distal end, and a lateral side extending between the proximal and distal ends, the lateral side of the cover flap being secured to one of the lateral sides of said tray and the distal end of said cover flap being secured to said tray by said retainer lid, wherein said cover flap covers said top surface of said tray at the proximal end of said tray, wherein said cover flap has a free edge that is adapted to flex away from said top surface of said tray. (i) a retainer sleeve having a distal end and a proximal end, the distal end of said retainer sleeve being wrapped around said top and bottom surfaces (72, 74) of said tray and being secured to said tray by said retainer lid, the proximal end of said retainer sleeve including a top panel that covers said top surface of said tray at the proximal end of said tray, wherein said top panel of said retainer sleeve has a free edge that is adapted to flex away from said top surface of said tray; or (ii) a cover flap having a proximal end, a distal end, and a lateral side extending between the proximal and distal ends, the lateral side of the cover flap being secured to one of the lateral sides of said tray and the distal end of said cover flap being secured to said tray by said retainer lid, wherein said cover flap covers said top surface of said tray at the proximal end of said tray, wherein said cover flap has a free edge that is adapted to flex away from said top surface of said tray.