Not so much a gadget as just a test tube, this BreathCapture is a pendant that holds someone's breath so you can take it around and smell it any time you want. Yes. That's right. Someone's breath.
Assuming this loved one has breath you actually want to smell, how long will the thing last? One sniff? Five sniffs? Then you have to have your lover go breathe into the vial again?
Of course, the pendant does come with free engraving, and you can even make it into a cross shape to combine your spirituality with your lousy judgement in sentimentality.