Dental floss has a serious problem with unnecessary waste: each length of dental floss has a “dead zone” at the ends that is used to wrap around fingers.
This unused region is thrown away without ever having been actually used as dental floss (Figure 1).
Instead of wrapping the dental floss around your fingers in order to hold it, it would be ideal if you could just grip the floss directly. This would avoid the wasted end regions, but, unfortunately, human hands are not optimized for this use case.
Fortunately, there is a tool that is perfect for this application: locking pliers (A.K.A. Vise-Grips™).
Instead of wrapping floss around your fingers, just hold the floss directly with two pairs of locking pliers, one in each hand, as shown in Figure 2.
In 2019, $6 will buy you 120 meters (4724 inches) of dental floss, which translates to 1/8th of a cent per inch. So if you save six inches of dental floss per day, that’s (600 cents / (4724 inches / 6)) = 0.76 cents per day of savings.
PROS: Saves 6+ inches of dental floss per day, or ¾¢ per day! Over the course of a year, this saves a grand total of $2.78 in 2019 dollars, which could buy you two small coffees at a fast-food establishment.
CONS: A person who uses these will probably inadvertently chip a tooth or knock one out completely with these pliers. Maybe they should be plastic instead of metal.