well, ya see, that's the cheapest part! i am very obsessive about brushing and flossing (because it's a cheap way to save money on dental bills, of course!). so i frequently use a piece of floss, then twist it up and stick it in my jeans pocket- just in case i need it again! it's only been in my mouth, and it's only going in my mouth, so it's no worse than using a finger to dislodge something. and sometimes it gets run thru the wash, and it's still good! like i said, the cheapest thing ever....