Dental floss comes in a variety of colors, materials and flavors. Waxed and high tech varieties like "Glide" will slide through extremely tight spaces more easily. Popular flavors include wintergreen and cinnamon. Unwaxed floss actually does a better job cleaning but tends to fray more.
Floss can be purchased in small self-dispensing boxes. It can also be purchased in special, single-use holders, which are useful for people who have a hard time wrapping floss around their fingers, have large hands or those with dexterity problems including arthritis.