Made in America: Companies show ABC's David Muir how they are giving back during the holidays

On this Giving Tuesday, these American-made items are the gifts that keep on giving.

In Northfield, Vermont, sock company Darn Tough Vermont is hard at work sewing socks for the colder weather.

For years, the company had donated 100% of their online proceeds to the Vermont Food Bank on Giving Tuesday. They reported Tuesday that they've already donated 1 million meals.

In Ipswich, Massachusetts, company Ipswich River Craft makes customized signs. Owner Pamela Tomlin said the company uses nautical flag signs to spell out personalized messages.

"What we're making are nautical flag signs. Every letter in the alphabet has a different flag. So, we spell out last names, boat names, initials and we're making one for you!" said Tomlin.