The sieve is made out of Graphene-oxide, not pure Graphene, so should be easier to produce.

I also have the feeling but people continue to state that it takes 15 years for products to come out in the past. I just don't see how in our day and age we see all the wonders of graphine promises and still sit here waiting for some to start coming to fruition. It holds so much promise.

It's the fusion of material sciences.