Because it's so sturdy, dental floss has its uses beyond mouth hygiene. You can repair shoes with it, cut cakes with it, and keep your gadgets' plastic caps intact with it. But did you know you could also sew with it, use it as a clothesline, tie a strong knot with it to keep your suitcase closed, and silence a dripping faucet? Traveler's weblog Gadling suggests these tips and others without requiring extra baggage. What other hacks do you have for dental floss? Share your tips in the comments.