The NuBra bra with silicone gel padding is one alternative to getting breasts enlarged. You can 'press this bra on' and go. It has no bra straps or side extensions and will augment your breasts by about half a cup size. The promotional material is thickly padded too; it says this bra is "a revolutionary invention that answers many women's prayers!"

You can experiment with creating different degrees of cleavage by positioning the bra cups closer together or farther apart.