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