I have about ten bags that I was using for about 15 years. In the summer I live on the Barnegat Bay and paddleboard daily from June -Late October. I used to pull at least 3 single-use bags out of the bay every day. Now, virtually none, except for the occasional ice bag and bait bags. I’m still pulling out water bottles and cans of White Claws. The difference was immediate, which is cool.