Walmart offers the Summer Infant Deluxe Folding Booster Seat in beige, model no. 13050, for $16.88. Opt for in-store pickup to avoid the $4.97 shipping charge. That's the lowest price we could find by $3. It's designed for children up to 33 lbs. and features a 3-point harness, folding design, and adjustable seat and tray.