With orders of $25 or more, Amazon offers the Anchor Hocking 5-oz. Measuring Glass for $1.76 with free shipping. (Non-members can spend $35 or more to qualify for free shipping.) That's the lowest total price we could find by $4. It features measurement markings for teaspoons, tablespoons, cups, fluid ounces, and milliliters.
Note: This item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more. It's also expected to ship in one to two months.