A carton (100; 300; 500) formed from a primary blank (6; 106; 206; 406) and at least a separate first reinforcing blank (8; 108; 208; 408), comprising: a first side panel (20; 120; 220; 420); a bottom panel (30; 130; 230; 430); a second side panel (40; 140; 240; 440); a top panel (60, 50; 160, 150; 260, 250; 460, 450), comprising a first top panel (50; 150; 250; 450) adhered to a second top panel (60, 160, 260, 460), said first top panel (50, 150, 250, 450), said first side panel (20; 120; 220; 420), said bottom panel (30; 130; 230; 430), said second side panel (40; 140; 240; 440), and said top panel (60, 70; 160, 170; 260, 270; 460, 470) being successively connected at transversely extending fold lines (31, 41, 51, 71; 131, 141, 151, 171; 231, 241, 251, 271; 431, 441, 451, 471); a plurality of first end flaps (22, 24, 32, 42, 44, 52; 122, 124, 142, 144; 222, 224, 232, 242, 244, 252; 422, 432, 442, 444, 452) at least partially closing a first end of the carton; and a plurality of second end flaps (22, 24, 32, 42, 44, 52, 122, 124, 142, 144, 222, 224, 232, 242, 244, 252, 422, 432, 442, 444, 452) at least partially closing a second end of the carton, wherein the first reinforcing blank (8, 108, 208, 408) comprises a plurality of foldably connected first reinforcing panels (81, 82, 83, 84, 85, 86, 87; 281, 282, 283, 284, 285, 286, 287), and is adhered to the primary blank at the first end of the carton, at which end the carton is multi-ply, wherein the bottom panel includes a transverse fold line (35; 135; 235; 435) extending across a width of the bottom panel characterized in that the first reinforcing blank (8; 108; 208; 408) further comprises a plurality of first reinforcing flaps (22', 32', 42', 52' 62'; 222', 232', 242', 252', 262'; 422', 432', 442'; 452', 462'), each of the first reinforcing flaps being adhered to at least one of the first end flaps (22, 24, 32, 42, 44, 52; 122, 124, 142, 144; 222, 224, 232, 242, 244, 252; 422, 432, 442, 444, 452), and the plurality of first end flaps comprises a first proximal side end flap (22, 122, 222, 422) foldably connected at longitudinal fold lines to the first side panel and a first distal side end flap (24, 124, 224, 424) foldably connected at longitudinal fold lines to the first proximal side end flap and the plurality of first end flaps comprises a second proximal side end flap (42, 142, 242, 442) foldably connected at longitudinal fold lines to the second side panel and a second distal side end flap (44, 144, 244, 444) foldably connected at longitudinal fold lines to the second proximal side end flap, the first and second distal side end flaps extend beyond the edges of the first reinforcing blank (8; 108; 208; 408). a first side panel (20; 120; 220; 420); a bottom panel (30; 130; 230; 430); a second side panel (40; 140; 240; 440); a top panel (60, 50; 160, 150; 260, 250; 460, 450), comprising a first top panel (50; 150; 250; 450) adhered to a second top panel (60, 160, 260, 460), said first top panel (50, 150, 250, 450), said first side panel (20; 120; 220; 420), said bottom panel (30; 130; 230; 430), said second side panel (40; 140; 240; 440), and said top panel (60, 70; 160, 170; 260, 270; 460, 470) being successively connected at transversely extending fold lines (31, 41, 51, 71; 131, 141, 151, 171; 231, 241, 251, 271; 431, 441, 451, 471); a plurality of first end flaps (22, 24, 32, 42, 44, 52; 122, 124, 142, 144; 222, 224, 232, 242, 244, 252; 422, 432, 442, 444, 452) at least partially closing a first end of the carton; and a plurality of second end flaps (22, 24, 32, 42, 44, 52, 122, 124, 142, 144, 222, 224, 232, 242, 244, 252, 422, 432, 442, 444, 452) at least partially closing a second end of the carton, wherein the first reinforcing blank (8, 108, 208, 408) comprises a plurality of foldably connected first reinforcing panels (81, 82, 83, 84, 85, 86, 87; 281, 282, 283, 284, 285, 286, 287), and is adhered to the primary blank at the first end of the carton, at which end the carton is multi-ply, wherein the bottom panel includes a transverse fold line (35; 135; 235; 435) extending across a width of the bottom panel characterized in that the first reinforcing blank (8; 108; 208; 408) further comprises a plurality of first reinforcing flaps (22', 32', 42', 52' 62'; 222', 232', 242', 252', 262'; 422', 432', 442'; 452', 462'), each of the first reinforcing flaps being adhered to at least one of the first end flaps (22, 24, 32, 42, 44, 52; 122, 124, 142, 144; 222, 224, 232, 242, 244, 252; 422, 432, 442, 444, 452), and the plurality of first end flaps comprises a first proximal side end flap (22, 122, 222, 422) foldably connected at longitudinal fold lines to the first side panel and a first distal side end flap (24, 124, 224, 424) foldably connected at longitudinal fold lines to the first proximal side end flap and the plurality of first end flaps comprises a second proximal side end flap (42, 142, 242, 442) foldably connected at longitudinal fold lines to the second side panel and a second distal side end flap (44, 144, 244, 444) foldably connected at longitudinal fold lines to the second proximal side end flap, the first and second distal side end flaps extend beyond the edges of the first reinforcing blank (8; 108; 208; 408).