Walmart has the Swiss Tech Unisex Travel Backpack w/ Luggage Passthrough Sleeve (Maroon) on clearance for $11 with free shipping with Walmart+ (30-day trial) or on $35+. Also on clearance: 

• Swiss Tech 12" Travel Duffel Weekender (Gray) for $10 (Black is $12)
• Swiss Tech 20" Softside Carry-on Luggage (Gray) for $37