We all need it - toilet paper! I always buy the double roll for the savings: cost, time and environment.
They're getting sneaky. When double rolls first came out, they would not fit clear across the shelf where I store them. Today, I was able to fit more double rolls onto the shelf, with room to spare.
Soon, "double" will be the new single. Will it be like ordering a coffee? A double double?
All I can say is, shame on the manufacturers. To think we wouldn't notice!