Toilet paper roll holder assembly comprising: a. at least one foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) folded around itself; said foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131), is made of synthetic material; b. first engagement means for engaging said foldable sheet (13,22,32,34,43,44,52,61, 64,113,114,115,122,131) to itself; characterized in that c. the assembly comprises second engagement means for engaging said foldable sheet to another foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131), or third engagement means for engaging said foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) to a supporting sheet (111,121), said supporting sheet (111,121) is not in folded form; said third engagement means is said first engagement means or different engagement means; said first, second and third engagement means are strip (12,15,21,31,41,42,54,132) and slit (11,14,24,51,133,134) couplings, said strip (12,15,21,31,41,42,54,132) is partially sliced off said foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) in proximity to one edge of said foldable sheet (13,22,32,34,43,44,52,61,64, 113,114,115,122,131), and said slit (11,14,24,51,53,133,134) is cut in proximity to the opposite edge of said foldable sheet (13,22,32,34,43,44,52,61, 64, 113,114,115,122,131) and either at a predetermined location at the lower part of said other foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) or in said supporting sheet (111,121), said strip (12,15,21,31,41,42,54,132) is coupled to said slit (11,24,51,134) at the opposite edge of said foldable sheet (13,22,32,34,43,44,52,61,64, 113,114,115,122,131) and either to said slit (14,24,53,134) located at a predetermined location at the lower part of said other foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) or to said slit in said a supporting sheet (111,121), said strip (12,15,21,31,41,42,54,132) being fit to slide through said slits (11,14,24,51,53,133,134) thereby locking the edges of said foldable sheet (13,22,32,34,43,44,52,61,64, 113,114,115,122,131) one to the other and engaging either said folded sheet (13,22,32,34,43,44,52,61,64, 113,114,115,122,131) to said other foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) or to said supporting sheet (111,121); said foldable sheets (13,22,32,34,43,44,52,61,64, 113,114,115,122,131) in their folded form providing closed space for holding toilet paper roll; said engagement means enabling reversible assembling and disassembling of said toilet paper roll holder; said other foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) and said supporting sheet (111,121) are made of synthetic material. a. at least one foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) folded around itself; said foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131), is made of synthetic material; b. first engagement means for engaging said foldable sheet (13,22,32,34,43,44,52,61, 64,113,114,115,122,131) to itself; characterized in that c. the assembly comprises second engagement means for engaging said foldable sheet to another foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131), or third engagement means for engaging said foldable sheet (13,22,32,34,43,44,52,61,64,113,114,115,122,131) to a supporting sheet (111,121), said supporting sheet (111,121) is not in folded form;