A Spray Air Freshener that smells of burnt food©
Applications may include :
1) Husband doesn't want to cook, pretends to burn supper, orders a pizza
2) In-laws come over, are less likely to invite themselves for dinner
3) Kids want that leftover lasagne, but there isn't enough for them AND you, so pretend you've burned it during reheating process.
*Estimated idea value: $217,000