A separator of items of the bottle type for use in a box (A), said separator comprising a longitudinal partition wall that is adapted to separate two opposing rows (B) of bottles, characterised in that the separator comprises a first type of sheet and a second type of sheet , - wherein each sheet and has a central partition wall , and two vertical equidistant flaps , , - with each flap , comprising two adjacent vertical portions: - a first vertical portion , that is distal to the respective central partition wall , , and - a second vertical portion , that is proximal to the respective central partition wall , located with respect to vertical folding lines , that join each flap , to their corresponding sheet , ; wherein the first vertical portion , has the same height as said central partition wall , ; - wherein the central partition wall of the first sheet comprises two separating vertical portions formed each one by a first cutting line , said first cutting line being formed by a vertical section and two inclined sections ; and - wherein the central partition wall of the second sheet comprises separating upper and lower portions generated each one by second cutting lines , said second cutting lines being formed by one vertical section and one inclined section , such that the central partition walls , , enable the formation of a continuous surface at the separator ends for providing a separator enabling reliable separation for each of the bottles. - wherein each sheet and has a central partition wall , and two vertical equidistant flaps , , - with each flap , comprising two adjacent vertical portions: - a first vertical portion , that is distal to the respective central partition wall , , and - a second vertical portion , that is proximal to the respective central partition wall , located with respect to vertical folding lines , that join each flap , to their corresponding sheet , ; - a first vertical portion , that is distal to the respective central partition wall , , and - a second vertical portion , that is proximal to the respective central partition wall , located with respect to vertical folding lines , that join each flap , to their corresponding sheet , ; wherein the first vertical portion , has the same height as said central partition wall , ; - wherein the central partition wall of the first sheet comprises two separating vertical portions formed each one by a first cutting line , said first cutting line being formed by a vertical section and two inclined sections ; and - wherein the central partition wall of the second sheet comprises separating upper and lower portions generated each one by second cutting lines , said second cutting lines being formed by one vertical section and one inclined section , - wherein the central partition wall of the first sheet comprises two separating vertical portions formed each one by a first cutting line , said first cutting line being formed by a vertical section and two inclined sections ; and - wherein the central partition wall of the second sheet comprises separating upper and lower portions generated each one by second cutting lines , said second cutting lines being formed by one vertical section and one inclined section , such that the central partition walls , , enable the formation of a continuous surface at the separator ends for providing a separator enabling reliable separation for each of the bottles. <EOS>