Sonic Plain Slush Only (No Syrup): nutrition and allergens
Sonic lists the Plain Slush Only (No Syrup) in 5 sizes, from 120 calories (Wacky Pack!) to 540 calories (RT 44). The Wacky Pack! has 0 g fat, 32 g carbohydrate, 0 g protein and 20 mg sodium.
Nutrition facts
| Per serving | Wacky Pack! | Small | Medium | Large | RT 44 |
|---|---|---|---|---|---|
| Calories | 120 | 180 | 240 | 380 | 540 |
| Total fat (g) | 0 0% | 0 0% | 0 0% | 0 0% | 0 0% |
| Saturated fat (g) | 0 0% | 0 0% | 0 0% | 0 0% | 0 0% |
| Trans fat (g) | 0 | 0 | 0 | 0 | 0 |
| Cholesterol (mg) | 0 0% | 0 0% | 0 0% | 0 0% | 0 0% |
| Sodium (mg) | 20 1% | 30 1% | 40 2% | 60 3% | 85 4% |
| Total carbohydrate (g) | 32 12% | 48 17% | 66 24% | 103 37% | 145 53% |
| Dietary fiber (g) | 0 0% | 0 0% | 0 0% | 0 0% | 0 0% |
| Total sugars (g) | 32 | 48 | 66 | 103 | 145 |
| Protein (g) | 0 0% | 0 0% | 0 0% | 0 0% | 0 0% |
Percentages are the share of the FDA Daily Value for adults and children 4 and over, worked out from Sonic’s published amounts (how % Daily Value works). A dash means Sonic does not publish that value for this size. Not published for this item: added sugars.
Using the FDA’s rule of thumb that 5% of the Daily Value or less per serving is low and 20% or more is high, the Wacky Pack! size is low in sodium, fat, saturated fat, cholesterol, dietary fiber and protein. Add it up with other items in the Sonic nutrition calculator.
Plain slush base without flavor syrup. Flavor add-ins are listed under Drink Add-Ins & Toppings.
Allergens
Sonic’s allergen information lists none of the allergens it reports for the Plain Slush Only (No Syrup).
| Milk | Not listed |
|---|---|
| Egg | Not listed |
| Fish | Not listed |
| Crustacean shellfish | Not listed |
| Tree nuts | Not listed |
| Peanuts | Not listed |
| Wheat | Not listed |
| Soy | Not listed |
| Sesame | Not listed |
| Gluten | Not listed |
Sonic relies on its suppliers for allergen information and shares cooking and preparation areas, so it says it cannot rule out cross-contact or promise that any item is free of an allergen, and no item is certified gluten-free, vegetarian or vegan. Blended drinks and frozen desserts share tools, fried foods share fryers, and grilled items share the grill. Buns, Texas Toast, eggs, grilled onions and grilled peppers are cooked with a bun oil that contains soy. Some breads come from local bakeries, so ingredients and allergens such as sesame can differ by restaurant. Tell your carhop about any food allergy before ordering. Items marked as fried carry a risk of cross-contact with all allergens.
Other items in Slushes at Sonic
By calories (Wacky Pack!), the Plain Slush Only (No Syrup) ranks 1 of 4 in Sonic’s Slushes section, from lowest to highest.
| Item | Calories |
|---|---|
| Plain Slush Only (No Syrup)Wacky Pack! | 120 |
| Cherry Cream SlushSmall | 410 |
| Blue Coconut Cream SlushSmall | 450 |
| Strawberry Cream SlushSmall | 480 |
Nutrition for all 4 items in Slushes at Sonic
Browse the Sonic menu by goal: high-protein items · low-calorie items
Sources
- 1 Sonic, Sonic Nutritional Information brochure (national) Covers nutrition and menu · Summer 2026 · Checked 8 Oct 2026
- 2 Sonic, Sonic Allergen Information guide Covers allergens · National Summer 2026 Allergen Guide · Checked 8 Oct 2026
Spotted a value that differs from the chain’s current information? Report it