Making Sturdy Stuff Out of Plastic Sheets, Part 1: Mail Bins - Core77
5pcs,Clear Cast Acrylic Sheet,1/16" Thick,3" x 3" Square Panel,Plastic Board for Picture Frames, Sign Holders - Walmart.com
White Expanded PVC Plastic Sheet | Boat Outfitters
Transparent Pvc Sheet Rigid Plastic 0.5-1mm Thick Picture Frame Mounted Double-sided Film - Tool Parts - AliExpress
PET Plastic Sheet for Folding Box - Desu Technology Packing Material Co.,LTD
Amazon.com : Corrugated Plastic Sheet for Indoor and Outdoor Use - 4 Mm Thick Poster Board, 24x36 Inches - Pack of 2 White Plastic Board Sheets - Waterproof Coroplast Sheets and Lightweight