For all of those times you've seen trash on a dive and wish you had a bag with you, the Fourth Element Ocean Debris Bag is perfect: small enough to be stashed in a pocket or clipped onto your gear, it is easy to carry on all of your ocean adventures. 

The mesh (easy drain) bag rolls out to collect any trash you find in the ocean and velcro closure stops it from escape. A great companion for any diver looking to help clean up our oceans.