Folinstall 1-Gallon Fermentation Jars 2-Pack — 4.3" Wide Mouth Glass with Airtight Lids & Airlocks

These are two 1-gallon Folinstall thick-glass fermentation jars with 4.3" wide mouths, airtight screw lids with silicone gaskets, and airlocks for small-batch fermenting, canning and brewing.

Whether you’re starting kombucha, sourdough starter, pickles, or small-batch brews, this Folinstall kit provides two durable glass jars sized for household fermentation. The jars include wide openings for easy access, measurement markings for precise recipes, and a complete lid system with grommets and three airlocks to vent gases while keeping contaminants out. Everything ships cushioned and ready to use.

How does the wide mouth make fermentation and prep easier?

The 4.3" opening simplifies adding ingredients, stirring, and scooping out finished ferments without awkward funnels or tools. It accommodates measuring cups, ladles, or bare hands so routine feeding and sampling are quicker and cleaner.

• 4.3-inch diameter opening for easy ingredient access and stirring
• 10" tall, 6.2" wide jar body for stable countertop use
• Marked graduations in ml and fl oz for accurate batches

What keeps these jars airtight but still safe for fermenting?

Each jar includes a food-grade plastic screw lid with a built-in silicone gasket that seals the mouth and resists rust. The lid has two silicone grommets so you can insert the supplied airlock(s) without opening the jar, allowing CO2 to escape while preventing outside air and contaminants from entering.

• BPA-free, durable lids with integrated silicone gaskets for a tight seal
• Two silicone grommets included so you can use one airlock and keep a spare
• Three airlocks supplied (one spare) so fermentation gases vent safely

Are these jars sturdy enough and easy to measure and clean?

The jars are made from thick, food-grade glass built to withstand repeated use and cleaning. Measurement marks are molded into the glass so you can follow recipes without extra tools, and the smooth interior and removable lids make them dishwasher-safe and simple to sanitize between uses.

• Thick reusable glass construction for durability and clarity
• Exact scale markings in milliliters and fluid ounces on the jar
• Dishwasher-safe surfaces and removable grommets for thorough cleaning

What comes in the complete Folinstall fermentation kit?

This kit is packaged with everything needed to begin small-batch fermenting: two square 1-gallon glass jars, two airtight fermentation lids with gaskets, three airlocks (including a spare), two extra grommets, chalkboard labels and a pen. The jars are wrapped in protective cushions to reduce breakage during shipping.

• 2 x 1-gallon Folinstall wide-mouth fermentation jars
• 2 x screw-on lids with silicone gaskets, 3 x airlocks, 2 x spare grommets
• 2 x chalkboard labels and pen for dating and naming batches

Who is this for: Home fermenters, small-batch brewers and kitchen preservers who want reliable, reusable glass containers for kombucha, sauerkraut, pickles, sourdough starter, fruit brews and other projects. If you need an easy-to-clean wide-mouth jar with built-in measurement markings and a safe venting system, this Folinstall 2-pack gives you a ready-to-use, well-sealed solution that fits countertops and pantry shelves.