Avery Flexible Binder, 0.5 in. Ring, Blue (17670) - Walmart.com
Amazon.com : Avery Flexible View 3 Ring Binder, Clear Front Customizable Cover with Solid Back, 1 Inch Round Rings, 1 Clear/Blue Binder (17675) : Office Products
Flexible Binders from School Specialty
Assorted Colors 3-Ring Poly Binder, 1-1/2" Capacity, Pack of 6
1 Inch 3 Ring Binders Soft Plastic Flexible Cover with a Pocket – by Enday | eBay
Amazon.com : Filexec 3 Ring Binder, 1 Inch Capacity, Opaque, Letter size, Pack of 4, Blue, Hot Pink, Purple, Green (50162-6497) : Office Binders : Office Products