Sonic Drive-In is known for its wide selection of drinks, but if you’re on a keto diet, you might be wondering what you can order without breaking your low-carb lifestyle. Luckily, Sonic offers several keto-friendly beverages, from sugar-free sodas to unsweetened iced teas and customized slushes.
This post covers the best keto Sonic drinks, customization options, and tips to keep your order low in carbs.
What Are Keto Sonic Drinks?
Keto Sonic drinks are beverages that contain little to no sugar or carbs, making them suitable for people following a low-carb, high-fat (LCHF) diet. These drinks typically include diet sodas, unsweetened teas, flavored water, and customized slushes.
Why Choose Keto Drinks at Sonic?
- Low-carb & sugar-free options – Perfect for ketogenic diets.
- Customizable flavors – Adjust sweetness and flavors to fit your diet.
- Large drink sizes – Stay hydrated with Sonic’s Route 44 (32 oz.) option.
- All-day half-price deals – Get discounts through the Sonic app.
Best Keto Sonic Drinks by Category
Keto-Friendly Sodas
Sonic offers several diet sodas that contain zero sugar and carbs.
- Diet Coke – Classic diet soda with no carbs.
- Coke Zero Sugar – Tastes like Coca-Cola but with no sugar.
- Diet Dr. Pepper – A keto-friendly version of the classic soda.
- Sprite Zero – A sugar-free lemon-lime soda with zero calories.
- Diet Root Beer – A great option for those who love classic root beer.
Keto-Friendly Iced Teas
For a sugar-free, low-calorie option, Sonic’s unsweetened iced teas are perfect.
- Unsweetened Iced Tea – Classic tea with zero carbs and sugar.
- Unsweetened Green Tea – A refreshing, antioxidant-rich tea.
- Peach Unsweetened Tea – Add sugar-free peach flavor for a fruity twist.
- Mango Unsweetened Tea – Customize with sugar-free mango flavor.
- Raspberry Unsweetened Tea – A berry-infused tea without the sugar.
Keto-Friendly Sonic Slushes
Most Sonic slushes contain sugar, but you can customize them to be keto-friendly.
- Plain Ice Slush – A base that can be flavored with sugar-free syrups.
- Diet Cherry Slush – Made with diet cherry syrup and ice.
- Sugar-Free Lemon Slush – A tangy and refreshing low-carb option.
- Blue Raspberry Sugar-Free Slush – A fruity slush without the carbs.
- Custom Keto Slush – Choose diet sodas or unsweetened tea as a slush base.
Keto Sonic Water & Lemonades
For a simple, low-carb drink, flavored water or custom lemonades work best.
- Sparkling Water with Sugar-Free Syrup – Choose cherry, peach, or mango flavors.
- Club Soda with Lemon & Lime – A refreshing, bubbly drink.
- Sugar-Free Lemonade – A low-carb version of Sonic’s classic lemonade.
- Lime Water with Ice – A simple and hydrating keto-friendly option.
How to Customize Your Keto Sonic Drink
To keep your drink keto-friendly, follow these customization tips:
Flavor Add-Ins (Sugar-Free Options Only)
- Cherry (Sugar-Free)
- Peach (Sugar-Free)
- Mango (Sugar-Free)
- Raspberry (Sugar-Free)
- Lime or Lemon Juice
Avoid These High-Carb Ingredients
- Regular slushes (contain high amounts of sugar).
- Sweetened iced teas (choose unsweetened instead).
- Classic lemonades (opt for a sugar-free version).
- Milk-based drinks (contain natural sugars).
Are Sonic Shakes or Coffee Keto-Friendly?
- No, most Sonic shakes contain high amounts of sugar and are not keto-friendly.
- Sonic coffee can be keto-friendly if ordered black or with heavy cream and sugar-free syrup.
How Do Sonic’s Keto Drinks Compare to Other Fast-Food Chains?
Sonic provides more customization than most fast-food restaurants, making it easier to stay at keto.
| Fast-Food Chain | Keto-Friendly Drink Options? | Sugar-Free Slushies? | Custom Sugar-Free Flavors? |
| Sonic Drive-In | Yes (Diet sodas, unsweetened teas, flavored waters) | Yes (Custom slushes) | Yes (Multiple sugar-free syrups) |
| McDonald’s | Yes (Diet sodas, unsweetened iced coffee) | No | No |
| Dairy Queen | Limited (Diet sodas only) | No | No |
| Starbucks | Yes (Keto iced coffee, sugar-free tea) | No | Yes (Sugar-free syrups) |
Why People Love Keto Sonic Drinks
Low-Carb & Sugar-Free Options
Sonic makes it easy to order keto-friendly drinks with custom flavors.
Great Taste Without the Guilt
Enjoy sweet, refreshing drinks without breaking ketosis.
Available All Day
Sonic’s half-price drinks (via the app) let you enjoy keto drinks for less.
FAQs
Can I drink Sonic’s cherry limeade on keto?
No, but you can customize a diet cherry limeade with diet soda and sugar-free cherry flavor.
Are Sonic’s unsweetened iced teas really sugar-free?
Yes, Sonic’s unsweetened teas contain zero sugar and carbs.
Can I get a keto slush at Sonic?
Yes! Order a plain ice slush and add sugar-free flavors.
Is Sonic coffee keto-friendly?
Only if ordered black or with heavy cream and sugar-free syrup.
How do I make sure my drink is keto?
Always specify sugar-free flavors, unsweetened tea, or diet sodas when ordering.
