There are no materials that magically end up in the oceanic gyres. Things that float and that we throw away will end up in rivers, then the ocean. Soda bottles

There are no materials that magically end up in the oceanic gyres. Things that float and that we throw away will end up in rivers, then the ocean. Soda bottles and supermarket bags do degrade pretty quickly. The problem is that if they do that while floating on the ocean, they have a bad impact on the environment. The pacific plastic patch has a half life between one and three years. There are no technical challenge to remove it, just a political one: stop throwing plastic in places that washes them away inside rivers and within a few years the Patch will be gone.