Just a simple 4Gb or 8Gb USB drive, anyone can do this with little knowledge and the right tools in possession.
We do not need any CD/DVD to install Windows or Linux on our laptops or PCs. Now we just use a pen drive to create a bootable USB for installation of OS.
Is that sound good? Nah, it is an old school trick. Do you need to install an operating system on your computer? Then quickly grab a CD or DVD and burn the OS in it to install.