A package, comprising: a carton comprising a first panel having a concave edge, a second panel having a concave edge, a third panel positioned between the first and second panels, and the third panel comprising a first portion having a first convex edge and a second portion having a second convex edge opposite the first convex edge, a first arcuate fold line connecting the concave edge of the first panel to the second convex edge of the second portion of the third panel, a second arcuate fold line connecting the concave edge of the second panel to the first convex edge of the first portion of the third panel, an attachment panel having a convex edge and a first free edge opposite the convex edge, a fourth panel comprising a first portion having a first convex edge, a second portion having a second convex edge opposite the first convex edge of the fourth panel, and a first intermediate fold line positioned between the first and second portions of the fourth panel, the first intermediate fold line is configured for allowing the fourth panel to be folded and moving the first and second convex edges both toward and away from one another, the first portion of the fourth panel overlapping the attachment panel, a third arcuate fold line connecting the first panel to the convex edge of the attachment panel; a fourth arcuate fold line connecting the second panel to the second convex edge of the fourth panel, and the third panel, as a whole, being in a substantially concave configuration with respect to an interior of the carton, and the third panel being retained in the substantially concave configuration at least partially in response to interplay between forces in at least the first, second and third panels, and the fourth panel, as a whole, being in a substantially concave configuration with respect to the interior of the carton, and the fourth panel being retained in the substantially concave configuration at least partially in response to interplay between forces in at least the first, second and fourth panels, and wherein the fourth panel further comprises a second free edge, and the first free edge of the attachment panel is parallel to the first intermediate fold line of the fourth panel. a carton comprising a first panel having a concave edge, a second panel having a concave edge, a third panel positioned between the first and second panels, and the third panel comprising a first portion having a first convex edge and a second portion having a second convex edge opposite the first convex edge, a first arcuate fold line connecting the concave edge of the first panel to the second convex edge of the second portion of the third panel, a second arcuate fold line connecting the concave edge of the second panel to the first convex edge of the first portion of the third panel, an attachment panel having a convex edge and a first free edge opposite the convex edge, a fourth panel comprising a first portion having a first convex edge, a second portion having a second convex edge opposite the first convex edge of the fourth panel, and a first intermediate fold line positioned between the first and second portions of the fourth panel, the first intermediate fold line is configured for allowing the fourth panel to be folded and moving the first and second convex edges both toward and away from one another, the first portion of the fourth panel overlapping the attachment panel, a third arcuate fold line connecting the first panel to the convex edge of the attachment panel; a fourth arcuate fold line connecting the second panel to the second convex edge of the fourth panel, and the third panel, as a whole, being in a substantially concave configuration with respect to an interior of the carton, and the third panel being retained in the substantially concave configuration at least partially in response to interplay between forces in at least the first, second and third panels, and the fourth panel, as a whole, being in a substantially concave configuration with respect to the interior of the carton, and the fourth panel being retained in the substantially concave configuration at least partially in response to interplay between forces in at least the first, second and fourth panels, and wherein the fourth panel further comprises a second free edge, and the first free edge of the attachment panel is parallel to the first intermediate fold line of the fourth panel.