LOWEST PRICE: 25-count PanSaver EZ Clean Multi-Use Cooking Bags Slow Cooker Liners for $6.51 on Amazon

Amazon has got this 25-count PanSaver EZ Clean Multi-Use Cooking Bags Slow Cooker Liners for $6.51 (26 cents each).  These slow-cooker liners got 4.7 out of 5 stars over 897 customer reviews and are an "Amazon's Choice" item.

• PanSaver eliminates food-to-hot metal contact which prevents the moisture in the food from scalding-off
• Patented contour-fit eliminates folds in the liner from trapping servings, since food doesn't stick to the surface there is virtually no waste
• Makes food safer since food cooked with pansaver never touches the pan, the chance of surface contamination is eliminated
• Fits 3.5 to 6.5 quart slow cookers. 9 x 13 oven dishes or standard roasting pans you can also use them to steam vegetables or fish
• Pansaver is FDA certified, NSF approved, KOF-K certified and produced in an ISO-9001 environment
• 25 liners and ties per case
• PanSaver eliminates food-to-hot metal contact which prevents the moisture in the food from scalding-off
• Patented contour-fit eliminates folds in the liner from trapping servings, since food doesn't stick to the surface there is virtually no waste
• Makes food safer since food cooked with pansaver never touches the pan, the chance of surface contamination is eliminated
• Fits 3.5 to 6.5 quart slow cookers. 9 x 13 oven dishes or standard roasting pans you can also use them to steam vegetables or fish
• Pansaver is FDA certified, NSF approved, KOF-K certified and produced in an ISO-9001 environment.

This is an Amazon Add-On item, which means that it ships for free with a $25 minimum order, and its price of $6.51 counts towards that $25.  You can buy multiples of this item to help get you to your $25 minimum for free shipping, so basically, if you buy three boxes, shipping is free.  (Other Amazon Add-On item deals can be found here.)