• All parts are USDA Food Grade BPA-free Compliant.  We understand your health concerns. QRP products were developed to help our director overcome prostate cancer. ALL QRP products are produced by a reputable food container manufacturer.
• 2 COMPLETE EFFORTLESS FERMENTATION KITS for any brand Mason jars your choice Regular Mouth and /or Wide Mouth Size (jars not included).  Each Kit includes a Robust Plastic Cap (your choice Regular Mouth or Wide Mouth Size) with Silicone Grommet installed, Silicone Seal, EXCLUSIVE PATENT PENDING FOOD RETAINER CUP, 3-Piece Airlock with Vented Lid, and Rubber Stopper.
• Save $$$ . . . NO COSTLY FERMENTATION GLASS WEIGHTS NEEDED!!!  QRP'S NEW PATENT PENDING FOOD RETAINER AERATION CUP situates on the mouth of the jar, stays in place, and KEEPS THE EXPANDING, FERMENTING FOOD SUBMERGED underneath the brine (juices) and inside the jar while isolating and protecting the airlock from stoppage and messy overflow.  We've actually heard stories of glass weights bursting for no reason during the fermentation process causing waste of the entire batch. 
• QRP STURDY AND DURABLE 3-PIECE AIRLOCKS allow observation of the release of oxygen bubbles, which reveals and confirms active fermentation.  3-Piece Water Airlocks don't get dirty and are easy to un-assemble and rinse, UNLIKE lids not requiring airlocks where food particles get trapped underneath difficult to remove and replace seals and date markers.
• QRP REUSABLE SILICONE SEALS STAY PUT. They are designed wide enough that they seat firmly against the roof of the Mason jar plastic cap completely underneath the threads and cannot fall out while screwing the lid onto or off the jar. And they are thick enough that they don't wrinkle while tightening. Easy removal for easy clean; clear silicone aids in cleaning inspection.
• The QRP SILICONE GROMMET is installed to the side of the cap to leave space for labeling and for ease of use for straw as drinking lid
• The QRP STOPPER provides a "quick close" for storage when the fermentation process has ended as opposed to removing the lid and replacing with another cap, which allows too much oxygen into the jar
• Jars and drinking straw not included
• NOT FOR ONLINE RESALE THROUGH AMAZON OR EBAY.  ALL QRP ADVERTISING IS COPYRIGHT PROTECTED!

God bless you and THANKS FOR SUPPORTING WORLD ORPHANS THROUGH SHINE IN THE DARK COMMISSION, A MEMPHIS INNER-CITY 501c3 CHARITABLE MINISTRY!