These straight sided bottles are clear, which makes it possible to see your product inside, and there are multiple ways you can use them. You can collect and retain your samples and sterilize the jars when you are done. They keep your product pure and secure. You can use them for storage or processing of your products, and a great option for jams, jellies, salsas and sauces. Many options and many sizes to choose from. Jars must be purchased in case quantities, which will help protect them when shipping. Have questions? Email us or give us a call. We are always happy to help. Remember, caps are sold separately and the caps on each order page are what will fit that jar. Caps cannot be interchanged with other jars.