Walmart offers the Rachael Ray 5-Piece Melamine Nesting Measuring Cups for $10.49. (Amazon charges the same.) Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest price we could find by $10. They're BPA-free, and the set includes 1/4 cup, 1/3 cup, 1/2 cup, 1 cup, and 2 cup sizes.