Did you know you can make great invisible ink from lemon juice? Armed with this new bit of knowledge I put my thinking cap on and came up with the idea that invisible ink + message in bottle = cool valentines day gift! The invisible ink bit is easy.
As in "our hearts match" and "the perfect match". Could it be an idea for wedding favor if interpreted that way? (have to make sure no one accidentally light them inappropriately during the wedding though)