4 QRP No Messy Overflow No Weights Needed Mold-Proof Mason Jar Fermentation Kits with Exclusive Food Retainer Cups keep food submerged in brine (2 REGULAR MOUTH & 2 WIDE MOUTH) SUPER FAST SHIPPER ~ MOST ORDERS SHIPPED SAME DAY, EVEN ON SATURDAY! (unless handling time is set for more than 1 business day) We understand your health concerns. QRP products were developed to help our director overcome prostate cancer. ALL QRP parts and products are USDA Food Grade BPA-free Compliant and are produced by a reputable food container manufacturer. MORE FOR YOUR MONEY ~ 4 COMPLETE EFFORTLESS MOLD-PROOF FERMENTATION KITS FOR STANDARD WIDE MOUTH MASON JARS (jars not included). Each kit includes a Robust Plastic Cap with Silicone Grommet installed to side to leave a space for labeling, Silicone Seal, EXCLUSIVE PATENT PENDING FOOD RETAINER AERATION CUP, 3-Piece Airlock with Vented Lid, and Rubber Stopper. Save $$$  NO COSTLY, BREAKABLE GLASS FERMENTATION WEIGHTS NEEDED! Dont be deceived by competitors pretty pictures showing full jars of food, but instruct you to leave 4" space at the top of the jar! QRP'S FOOD RETAINER CUPS allow for FULL Mason Jar Food Fermentation. 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. BONUS: A FREE GIFT of an "Our Daily Bread" Christian daily devotional is included with each order. If you're not interested in receiving the booklet, simply send a message when placing your order and request that we withhold the gift. Thanks for your consideration! Your Quality Reliable purchase supports WORLD ORPHANS. We appreciate and THANK YOU in advance for your support.