It’s difficult to give a precise answer to this question without knowing the specific size of the Gatorade bottle you are referring to. Gatorade bottles come in a variety of sizes and shapes, and the width of the mouth may vary.
Generally speaking, the mouths of Gatorade bottles are designed to be wide enough to easily drink from, but not so wide that the contents spill out easily. The width of the mouth may also vary depending on the type of cap or closure used on the bottle. Some Gatorade bottles have a wider mouth that is intended for use with a sports cap or nozzle, while others have a narrower mouth with a traditional screw-on cap.
If you have a specific Gatorade bottle in mind and would like to know the width of the mouth, you may be able to find this information on the bottle itself or on the packaging. You could also measure the width of the mouth using a ruler or other measuring tool.