Bags are sections of material or fabrics that are utilized to carry objects. Bags can be any variety of sizes, colors and shapes.
About Laptop Cases:
Laptop cases are portable containers designed for carrying a laptop computer. Laptop cases are made in a wide variety of soft or hard materials and often feature a carrying handle and a shoulder strap as well as inside compartments and pockets to fit the computer and accessories.
A zipper, sometimes called a 'slide fastener' is a device consisting of two toothed tracks or spiral metal or plastic coils, each bordering one of two edges to be joined, and a piece that either interlocks or separates them when pulled.