For Prime members only, Amazon offers this Refreshing Drinks Sample Box, bundled with a $9.99 Amazon Credit, for $9.99 with free shipping. (The credit must be used on select beverage products; it will be applied to your Amazon account one week after your order ships.) That's tied with last week's mention, and assuming you'll use the credit, essentially a free box of at least eight samples.

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Note: This item may take up to two weeks to ship.