BROOKLYN, N.Y. - One of the most polluted waterways in the country, the Gowanus Canal is undergoing a federal cleanup as a Superfund site. But at one neighborhood shop, the Gowanus becomes “Superfun" spawning hats and other items highlighting the toxic canal that runs through the neighborhood. From poison bottles to towels decorated with deadly cocktails to creepy stickers.

"To my utter surprise the Gowanus souvenirs actually became a thing that people wanted and we're excited about it. I think it comes out of this joint love of the Gowanus and what a quirky odd paradoxical neighborhood it is," said Ute Zimmermann, owner of Gowanus Souvenir Shop.

What started as a hobby for Ute Zimmermann became a business. She opened Gowanus Souvenir Shop at 567 Union Street four years ago tapping local artists to create Gowanus themed products. The best sellers are the Gowanus Swim Team t-shirt and the Black Mayo artwork that glows in the dark.

"Black Mayo is the official name for the 10 feet of sludge at the bottom of the canal," Zimmermann said.

Items are priced from one dollar for some of the candy items with names like toxic waste, to more than a thousand dollars for artwork like a perfume bottle, Canal Number 5. While Zimmermann has seen a steady stream of customers over the years, she's ready to close the retail business and go wholesale instead, getting her products sold at the Brooklyn Museum and online. So now she's having a storewide sale with 25 percent off.

"I really like the store and because it's closing I wanted to get the last of the Gowanus items," said Lorrie Mann, a customer.

"It's really fun for kids because it has a buch of cool stuff," said Isabel Brown, a customer.

There are also mementos of Sludgie. Sludgie was the name New Yorkers gave to the whale stranded in the Gowanus Canal in 2007 that eventually died. Zimmermann says she's sold out of puzzles depicting the sheen reflected off the canal's water. But if you're looking for her other goods in the neighborhood, some of them will still be for sale at the store taking over the site.

The Gowanus Souvenir Shop closes January 31.