The patented Pickle Pipes from Masontops are made out of silicone and designed to automatically vent fermentation gas through a one-way valve without letting in any oxygen that can cause spoilage. Its the easiest airlock to use and doesn't require any daily monitoring or burping.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.