Here is the free and discounted material that you can get on polling day

After the election, this election day, you may be able to collect gifts.

Restaurants, transport companies and other businesses encourage voters to vote by offering discounts or free products.

But if they demand that customers show proof of their vote, using an "I Voted" sticker, they may not be legal, according to experts. When federal candidates are registered on the ballot, it is illegal to pay or offer to pay other people to register or vote, according to Nation's Restaurant News, a trade publication.

See: Voters polled on polling day signaling a shortage of "I Voted" stickers

But that has not stopped some companies, especially those that circumvent this law by offering discounts or free products to anyone who asks them, not just those who say they voted.

If you want to take advantage of these one-day offers, here's where you can do it:

Food in the United States

The organization Pizza to the Polls will send free pizzas from local vendors to all voting lines.

Shake Shack is offering free chips with any purchaseeither by displaying your voting sticker in a store, or by entering the code "ivoted" on the restaurant application.

Jeni's gorgeous ice cream will give her an extra free scoop in her stores on election day.

See: Why do Patagonia and Jeni's gorgeous ice cream really want you to vote in Tuesday's midterm elections?

The California Tortilla chain will give free chips and queso in its storeswhen you show a voting sticker or tell the cashier you voted.

Potbelly, the sandwich chain, will give a free cookie with any entry.

Stumptown Coffee offers free coffee to those who requested, helped register voters, or volunteered at the polls on November 6th.

Baked by Melissa, the cupcake shop gives 10% off polling day.

Bobo's, an oat bar company based in Colorado, gives free bars to those who tag the brand on social media.

And the Corner Bakery Cafe chain is offering free coffee to those who come to the shops with stickers showing that they voted.

Regional food offers

There are probably some bargains to be found at local restaurants in your area. For example, in Miami, you can get free mojitos and mini daiquiris after voting, while in Philadelphia you can enjoy a free miniature budino (a dessert), among other offers.

Birch Coffee in New York offers free drip coffee to voters, and The Roasterie in Kansas City, Mo, is too.

Transport

Need a ride to vote? There are offers of Uber, Lyft, Motivate (a company that runs self-serve bike programs in cities like Chicago, New York, Boston, and San Francisco), as well as transit services in cities such as Kansas City, Los Angeles and Albuquerque, N.M.

Clothing and cosmetics

Also check with your favorite retailers.

Some like Everlane and ModClothhave changed their schedules or are closed to allow their employees and buyers more time to go to the polls. But of others, like Tarte Cosmetics, offer offers on polling day.