This would make a great gym bag, or easy carry-on item! Walmart.com has this Joyway 2-Piece Duffel Bag Travel Set for just $16.99 (reg. $49.99) right now.

This highly-rated set comes with a zippered toiletry bag as well as an expandable duffel bag. They are both made out of durable, lightweight, and waterproof material. Please remember that prices may change.