TerraCycle and Old Navy are encouraging us to ditch our old flip flops and donate them to their new recycling program. To be a part of this great green initiative, become part of the Old Navy Flip-Flop Brigade and start scouring for old flip flops. The companies encourage participants to send 50 pairs of rubber flip flops of any brand in a bundle. To show their appreciation for your efforts, they'll send you some Old Navy coupons, which you can distribute amongst your friends who've given up their old flip flops for the cause. It could get pricy to send such a massive parcel, but the Flip-Flop Brigade will cover all costs. You just need to download a pre-paid shipping label from the TerraCycle website and drop off your flip-flops to any UPS location. Those Old Navy vouchers are pretty alluring, but so's the fuzzy feeling that comes from doing good. The flip-flops are saved from a life in landfill and destined to become something more, like playground equipment or a park bench. Fifty flip flops sounds like a lot to collect, but if you start polling your friends and family I’m sure you'll be surprised by how many ratty rubber beach shoes they have hiding at the back of their closets!