"Have you tried our pistachio? How about the Ovaltine?" says Khalid Hamid, co-owner and operator of Island Pops in Crown Heights, Brooklyn, desperately trying to find something new for me. Only I'm here every week, and I've tasted pretty much everything. He lets me try something he's been working on: a fruit-and-champagne-filled Mother's Day flavor. A week later, I'm back. His face lights up, telling me about a tweak he's made pushing the flavor over the edge.