Amazon’s Prime sample boxes were a huge hit with our readers this year, but now they’re making the concept a lot more flexible with a complete sample storefront.

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It works like this: You just buy the samples you want for $2-$4 each, and after they ship, you’ll get an Amazon credit to spend on full-sized products from the same brand. That might be a little risky if you aren’t sure you want the brand, but if it’s something you buy anyway, it’s like getting the sample for free.

The store is full of skincare items, protein powders (including stuff from Vega!), snacks, makeup, and more, so load up your cart, and rake in those credits.