Jarware Mason Jar Coffee Pour-Over is a great way to make amazing coffee. The pour-over is made with sturdy, long-lasting stainless steel. The lid snaps on to any mouth size of Mason jar, and when it’s properly secured it’s also leakproof. This makes these a great camping accessory, or for your trailer or RV. They are top rack dishwasher safe, so are easy to clean. Remember, you need to supply the Mason jar. We recommend you use a 16 oz. jar for this size of pour-over. This Mason jar accessory fits both regular and wide mouth jars so there’s no need to find the right size of mouth.