--- product_id: 66506764 title: "4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH)" brand: "quality reliable products" price: "€ 33.19" currency: EUR in_stock: true url: https://www.desertcart.hr/products/66506764-4-qrp-mason-jar-drinking-fermentation-lid-cap-food-grade store_origin: HR region: Croatia --- # 4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) **Brand:** quality reliable products **Price:** € 33.19 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) by quality reliable products - **How much does it cost?** € 33.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/66506764-4-qrp-mason-jar-drinking-fermentation-lid-cap-food-grade) ## Best For - quality reliable products enthusiasts ## Why This Product - Trusted quality reliable products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Without some form of gasket, the Mason jar plastic lids are not airtight. Quality Reliable Products Mason Jar Silicone Seals fit snug into Mason jar plastic lids. QRP seals provide a perfect airtight, anaerobic enclosure while fermenting Pickles, Kimchi (vegetables) or Kombucha (tea). QRP SEALS are designed wide enough that they seat firmly against the roof of any brand Mason jar plastic cap completely underneath the grooves and cannot fall out while screwing the lid onto the jar. CAUTION: OVERTIGHTENING COULD DAMAGE THE SEAL AND MAKE IT DIFFICULT TO REMOVE THE CAP! 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. Metal vs. Plastic Lids use for fermentation and storage of fermented foods? We find that whatever we are fermenting doesn't normally come in contact with the lid during fermentation, however can briefly come in contact with the lid during storage. We've done the research, which reveals that metal shouldn't be used during fermentation, nor for storage of fermented foods due to possible corrosion. We use these Fermentation Lids for fermenting Kimchi, and during the second stage fermentation of Kombucha in Quart and Half Gallon Mason Jars. ## Features - SUPER FAST SHIPPER EVEN SHIPPING ORDERS RECEIVED BY 7 PM CST ON SATURDAY! (unless handling time is set for more than 1 business day) - All parts are BPA-free Food Grade; 2 REGULAR MOUTH and 2 WIDE MOUTH Mason Jar Plastic Caps with 4 Silicone Grommets installed, 4 Silicone Seals, and 4 Rubber Stoppers; JARS, AIRLOCK, AND DRINKING STRAW NOT INCLUDED - QUALITY RELIABLE PRODUCTS REUSABLE SILICONE SEALS are the best seals for any brand Mason jar plastic caps on the market guaranteed! They are designed wide enough that they don't fall out while screwing the plastic lid onto the jar and provide an airtight fit. 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 Grommet is installed to side of Lid 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. - BONUS: A FREE GIFT of an "Our Daily Bread" Christian daily devotional is included with each order. If you aren't interested in receiving the booklet, simply send a message when placing your order and request that we withhold the gift. Thanks for your consideration! ## Images ![4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) - Image 1](https://images-na.ssl-images-amazon.com/images/I/4165n%2BXYjDL.jpg) ![4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) - Image 2](https://images-na.ssl-images-amazon.com/images/I/41wm4DcUX6L.jpg) ![4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) - Image 3](https://images-na.ssl-images-amazon.com/images/I/41Yo9aluooL.jpg) ![4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) - Image 4](https://images-na.ssl-images-amazon.com/images/I/41PO1DJI5kL.jpg) ![4 QRP Mason Jar Drinking/Fermentation Lid Cap Food Grade w/installed Grommets, Seals & Stoppers (2 REGULAR MOUTH & 2 WIDE MOUTH) - Image 5](https://images-na.ssl-images-amazon.com/images/I/41o9FwMjDWL.jpg) ## Available Options This product comes in different **Size** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/66506764-4-qrp-mason-jar-drinking-fermentation-lid-cap-food-grade](https://www.desertcart.hr/products/66506764-4-qrp-mason-jar-drinking-fermentation-lid-cap-food-grade) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-13*