Convenience-store chain Kangaroo Express has returned its Roo Cup to store shelves throughout the Southeast for the fourth consecutive summer.

The 2014 collectible cup retails for $6.99, plus tax, and can be refilled with any fountain or frozen beverage for 25 cents through Sept. 30, almost a full month longer than last year, at any of the 1,500-plus Kangaroo Express locations.

Popular customization options, such as colored straws, also have returned, giving customers ways to personalize their Roo Cup along with additional opportunities to save. During Straw Days, fans with a specific color straw can get a free refill.

Kangaroo Express is also offering a free refill with the purchase of a grill item, such as a hot dog or taquito, at grill-ready stores. Discounted candies and snacks are available in the Roo Cup display.

Roo Cup enthusiasts are encouraged to share their experiences through social media using the hashtag #ROOCup. Additionally, fans can participate in monthly social-media contests to win prizes. Follow Kangaroo Express on Twitter and Facebook to learn more.

Customers can join the Roo Club by texting RooClub to TheRoo (843766) or by downloading the free Kangaroo Express mobile app. Members will receive text-messaging deals, such as alerts on Straw Days and in-store deals on candy and snacks.