Walmart offers the Mace Triple Action Police Pepper Spray for $9.99. It falls to $9.74 when you choose in-store pickup. That's tied with our mention from two weeks ago and the lowest price we could find by $3 today. It contains OC pepper, tear gas, and UV dye and reaches up to 12 feet.
Vinegar is arguably the most versatile product in your house. If you aren't using it for all of these purposes, you're probably wasting money.