Fry's Electronics offers the Philips Avent Formula Dispenser / Snack Cup in Blue for $4.79 with free shipping. (Amazon charges the same with free shipping for Prime members.) That's the lowest price we could find by $4, outside of the mention below. It's BPA-free and sterilizer-, microwave-, and dishwasher-safe.
A close price: Walmart charges $5.95 with free in-store pickup.