Fillers are items used to fill the price gap in order to qualify some special offers given by a merchant. For example, you add a $20 item to shopping cart on amazon.com. To qualify for free shipping ($25 minimum purchase on amazon.com), you will need a $5 filler. This tool helps you find items in a specified price range, in order to qualify free shipping or special promotions in a store. To start, just click one of the following store names.