Masontops Pickle Pipes Waterless Airlock Fermentation Lids Wide and Regular Mouth Mason Jar Fermenter Caps Review (2026)

Who this mixed size set is for

This set is built for fermenters whose jar collection is not standardized, with some wide mouth jars from bulk canning purchases and some regular mouth jars left over from store-bought preserves or older canning supplies. Rather than buying two separate single-size packs, this combo covers both with one purchase, which is convenient for a household experimenting with different jar sizes for different ferments, such as a wide mouth jar for kraut and a regular mouth jar for a smaller batch of pickled garlic. It suits anyone getting started with fermentation who is not yet sure which jar size they will settle on. It is a weaker match for someone who has already standardized entirely on one jar size, since a mixed pack delivers fewer lids of that preferred size than a dedicated single-size pack would for the same price.

How the Masontops design works

Like other Pickle Pipe style lids, these are one-piece silicone caps with a built-in one-way valve that lets fermentation gas escape while keeping oxygen and airborne contaminants out, without any water to fill or spill the way a traditional airlock needs. The set includes caps sized for both wide mouth and regular mouth mason jars, so you can match the lid to whichever jar you are using for a given batch. The silicone is described as premium and food-safe, and the caps are low profile compared with a tall water-lock airlock, which lets jars sit upright in a cupboard or on a shelf rather than needing extra vertical clearance. As with other pickle pipe style lids, a standard metal mason jar ring for each jar size is required to hold the cap in place and is not included in this set.

Living with a mixed size set day to day

In daily use, you simply choose the cap that matches whichever jar you are packing for a new batch, stretch it over the rim, and secure it with the matching size ring, then leave the jar alone until your ferment is ready, since the valve vents automatically without needing to be checked or refilled. This flexibility is useful if you like to ferment different vegetables at different scales, using a smaller regular mouth jar for a quick batch of hot peppers and a larger wide mouth jar for a bigger batch of sauerkraut at the same time. Cleaning follows the same routine as other pickle pipe lids: they are dishwasher safe and reusable across many batches, so a normal wash between ferments is enough to keep them ready for the next jar. Because the set mixes two sizes, keep track of which cap fits which jar so you are not stretching a regular mouth cap over a wide mouth rim by mistake.

Trade offs and how it compares with single-size packs

Against the wide mouth only three pack, this combo trades quantity of one size for flexibility across two sizes, which is the better choice if your jar collection is genuinely mixed rather than mostly one size. Compared with the wide and small combo kit aimed more specifically at sauerkraut and pickle projects, this listing is described more generally as wide and regular mouth caps, so the practical difference between the two combo options often comes down to which specific jar sizes you already own. As with every pickle pipe design, none of these sets include a jar or the metal rings needed to hold the silicone caps on, so first-time buyers should check their existing jar and ring inventory before assuming this purchase covers everything needed to start a batch.

Verdict and who should pick something else

For a fermenter with a genuinely mixed jar collection, this wide and regular mouth combo earns our score of 8.4 out of 10 for covering both common mason jar sizes without forcing a choice between two separate single-size packs. It rewards someone who wants flexibility over maximum quantity of one size. Buyers who have already standardized on a single jar size, whether wide or regular mouth, will get better value from a dedicated single-size pack with more lids of the size they actually use. As with any pickle pipe style lid, remember that jars and metal rings are not included, so factor those into your first order if you do not already have them on hand.

Frequently asked questions