If you want to order something online but don't have your own credit card or you don't want your purchase to show up on your debit card or credit card statements if you have a joint account with your parents you can go to walmart and get a prepaid reloadable card.
Bluebird card is the best as it only cost $1.00 at walmart or you can order a bluebird card for free online.
Best thing with a bluebird card is it's free to reload and has no transaction or other fees associated with it.