Walmart offers the Stalwart Diversion Book Safe for $9.99. Opt for in-store pickup to dodge the $5.99 shipping fee. That's the lowest price we could find by $2, although we saw it for around a buck less in our mention from last September. It looks like a copy of The New English Dictionary, but it's actually a lockbox with a hidden storage area. Two keys are included.
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.