If you're trying to beat the heat and quench your thirst on a hot summer day, you might be in luck.

National Smoothie Day is on June 21 which celebrates the blended dessert that comes in a variety of flavors. Smoothies are often made with an ice cream, milk, yogurt or fruit juice base. The treat can be enjoyed with fruits or vegetables and is often used as an alternative to get in those nutrients that we need.

It isn't known when the first smoothie was created, but it is believed that Eastern and Mediterranean cultures created fruit drinks similar to smoothies for hundreds of years, the Juice Shop said. In 1932 Stephen J. Poplawski received patents for a machine that would liquify fruits and vegetables, the Illinois State Museum said.

As the use of refrigerators and blenders gained popularity, fruit drinks became a requested refreshment item. In the 1960s, smoothies were at the forefront of the macrobiotic diet which caused many Americans to think about how and what they ate, the Juice Shop said.

Whether you drink a smoothie as a healthy alternative or a have one as a thirst quencher, you’ll want to check your favorite smoothie shop for their National Smoothie Day deals and freebies.

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National Smoothie Day Deals and Freebies

Jamba Juice

For $1 customers can visit their Jamba Juice from 3:00 p.m. to 6:00 p.m. local time to enjoy one 16 oz Mango-A-Go-Go or Strawberry Whirl Smoothie. This deal will only be available for in-store purchase at participating locations while supplies last. The smoothie day offer is not valid with any other offers or rewards, in drive thrus, or on third-party food delivery services.

Outshine

Do you like making your smoothies at home? Outshine is giving you that option with their sweepstakes for a limited-edition Outshine Smoothie Cocktail Kit.

The kit comes with

• three Outshine Fruit and Yogurt Smoothie pouches
  • Blueberry Pear
  • Peach Raspberry
  • Strawberry Coconut
• two cocktail glasses
• one cocktail stirrer
• $25 gift card to purchase your drink of choice

To enter customers can visit the Outshine Instagram's page (@outshinesnacks) for directions and to see the official rules of the sweepstakes. Customers have until June 21 at 11:59 p.m. ET to enter their submission.

Planet Smoothie

From 2:00 p.m. to 5:00 p.m. local time Planet Smoothie customers can enjoy a free 20 oz Lunar Lemonade smoothie at any of their locations. The deal is limited to one drink per person and only available in-stores.

"We are also immensely grateful to those customers who have made Planet Smoothie a part of their lives," Nicole Butcher, senior director of marketing at Kahala Brands, parent company of Planet Smoothie said in the press release. "We think National Smoothie Day is a wonderful opportunity for us to express that gratitude and celebrate our customers' unwavering loyalty and dedication to the brand as well as invite new guests to try Planet Smoothie for the first time."

Playa Bowls

Playa Bowls is celebrating National Smoothie Day with a freebie giveaway. Customers can get a free reusable color-changing cup after they purchase of any smoothie.

Some smoothie options include:

• Aloha Smoothie
• Acai Energy Smoothie
• Matcha Smoothie
• Pink Pataya Smoothie
• Strawberry Banana Smoothie
• Sweet Summer Smoothie

Customers can join the Play Bowls loyalty program to receive Playa Rewards offers through their mobile app. The color-changing cups will be available while supplies last and will be limited to one cup per person.

Smoothie King

Smoothie King is ending its smoothie week with a free drink, extra points and a chance to win some cash. To honor National Smoothie Day Smoothie King will offer the free Upsize Friday, a deal that allows its customers to upgrade from a 20 oz to 32 oz drink on Fridays.

Health Rewards members will have the chance to earn 3X points on their orders and have a chance to enter a sweepstakes to win $5,000. All of the members orders on Friday will automatically put them on the list for the sweepstakes. The deal will be available for Healthy Rewards members in-store, in-app and online.

Tropical Smoothie Cafe

Tropic Rewards members can sip on a free 24 oz smoothie when they purchase a bowl or food item at Tropical Smoothie Cafe.

Members can claim their offer on June 21 when the deal becomes available. It can be redeemed in cafe, or you can order ahead for pickup or delivery. Some exclusions will apply.

Ahjané Forbes is a reporter on the National Trending Team at USA TODAY. Ahjané covers breaking news, car recalls, crime, health, lottery and public policy stories. Email her at [email protected]. Follow her on Instagram, Threads and X (Twitter) @forbesfineest.