Among the valuable things to look for at Goodwill, I keep an eye out for Pyrex, high-end cookware and vintage cookie jars that fetch a high price on eBay or Etsy. Cookie jars have been around for the ...

But if your cookie jar is on the antique side and doesn't have an airtight seal, preserving those homemade treats can be a challenge. We get it — maybe your cookie container is an heirloom from ...