With orders of $25 or more, Amazon offers Prime members the Disney's Frozen Tin Lunchbox in Blue, for $2.95 with free shipping. (Non-members can qualify for free shipping with orders of $35 or more.) That's the lowest total price we could find by $5. It features an embossed lid and measures 7-5/8" x 6" x 2-3/4".
Note that this item is part of Amazon's add-on program and can only be purchased with an order of $25 or more.