If a dress is that memorable, you’ll only want to be seen in it once, right? A former Lucky editor just launched a new dress-rental site called (oh, the puns!) Wear Today, Gone Tomorrow, where for a mere 90 percent off retail you can borrow a nearly-new designer gown for a week. For only 70 percent off the sticker price you can hang on to your Carolina Herrera for a month. If the rental doesn’t fit like a glove, you can return it for your money back—guaranteed.