Staple has partnered with Danny Meyer's Shake Shack burger empire for a unique joint venture, one that encompasses both wearables and edibles. The former spans a white graphic tee -- adorned with the Shake Shack logo, Staple pigeon and various illustrated NYC landmarks -- as well as Knockaround sunglasses, featuring a black matte finish and green/blue mirrored lenses. The third and final offering from the delectable project is the limited-edition Staple Concrete, made with rich and creamy vanilla frozen custard, blended with seasonal raspberry jam and chunks of black sesame glazed cake doughnut, specially made by NYC's Doughnut Plant. The Staple Concrete is available now until September 21st, appearing on the menu of the following Shake Shack locations: Madison Square Park, Battery Park City, Downtown Brooklyn, DUMBO Brooklyn, Flatbush Avenue Brooklyn, Theater District, Upper East Side, and Upper West. The T-shirt and sunnies from the Shake Shack x Staple collaboration, meanwhile, can be purchased through Staple's online store.