In design and operation, the wind-powered Birdbath makes an appetizing argument for reuse, recycling, energy conservation, and organic ingredients, which appear in new eco-themed products like the (save the polar) bear claw, with stewed apricots, and (what’s your carbon footprint?) cookies. Buyer beware: Thanks to the un-waxed bags Rubin uses, “you’re gonna get butter stains,” he says, and after you read the “napkin math” on his forthcoming Website, he hopes you won’t be so quick to reach for extras. “We’re gonna force a lot of stuff on people that’s new behavior,” says Rubin, who serves cream-tinged farmer’s lemonade and organic coffee (grounds to be composted, naturally), but no bottled water — “an environmental catastrophe” in Rubin’s book. Here’s a virtual tour, and Rubin’s pointers on how to build a green bakery.— Rob Patronite and Robin Raisfeld

145 Seventh Ave. S., at Charles St.; 646-722-6570.