ALL USB Flash devices can be made bootable. I have an old 16MB CompactFlash card here and put it in my card reader, viola, bootable. You have to "sys" the flash card, and you need a motherboard that supports treating USB drives as bootable devices.
I had a P4C800-E Deluxe that could be set in BIOS to make any USB device the "A" drive. That includes thumb drives. Nice having a 16MB floppy in DOS. From there I could have installed windows had the flash card been large enough.
<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>