Want Lemon with that Seltzer?

I love this Sombrero Lemon Juicer from Umbra. Unfortunately it seems to be mysteriously out of stock everywhere . . . wonder if there was a patent conflict. When I find out where you can still get one, I'll add it to the comments. But for now, just appreciate the simple beauty of the solution to: How can I add fresh squeezed juice directly to my seltzer? Like this, friends.