Kate Sanderson is the original creator of the iconic Chicago flag bags and the founder of Sink or Swim, a Chicago-based brand she started in 2011. Specializing in custom, handcrafted bags made from glitter vinyl, she built a loyal following with her bold, eye-catching designs that blended style, durability, and city pride.

Using high-quality, waterproof, and vegan-friendly materials, Kate’s designs became a staple among locals, especially her signature Chicago flag bags, which set the trend for many that followed. Though she stopped making bags eight years ago, her influence on the city’s accessory scene remained.

A relaunch of a few of the most popular products was in order.