So far, personally I find that Cottonelle toilet paper is the cheapest and the strongest to use. Remember to buy them on sale only because when they are not on sale, they cost about $18.99 for double roll consisting of 24 rolls. On sale, they cost about $9.98 in Walmart and other stores. Walmart has the most competitive prices amongst the other retail stores for Cottonelle toilet paper.
Cottonelle toilet paper has two kind of product:
(1) Blue plastic bag which says "Clean Care with clean ripple". (Caution: This roll is only 1 ply so its thinner and tears more easier than the next one mentioned below. This blue plastic bag ones though have more sheets available to use)
(2) Purple plastic bag which says "Ultra comfort". (Caution: This is 2 ply and so it is thicker than the one mentioned above and is the preferred one. This purple plastic bag ones have lesser sheets available to use)