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The Microppose® Smart Storage Lid turns any wide-mouth mason jar into humidity-monitored storage for dried mushrooms and herbs. A built-in digital hygrometer shows the humidity inside the jar in real time, and a silicone ring holds an airtight seal. The battery is pre-installed and two silica packs are included, so it's ready to use out of the box.
The built-in hygrometer reads 10–99% RH and refreshes every 5 seconds, so you know your jar is in range instead of guessing.
A silicone ring seats evenly on any wide-mouth mason jar and holds conditions steady between openings.
A low-profile 89mm lid that stacks cleanly, using the jars you already own.
Put fully dried mushrooms in a wide-mouth mason jar with one desiccant pack.
Twist the lid on so the silicone ring seats evenly.
Let the air inside settle, then check the reading.
Add the second pack to go drier, or a briefly damp paper towel to add moisture, until you hit your target.
Target humidity for dried mushrooms: 50–55% RH for short-term storage (1–90 days) and 30–40% RH for long-term storage (90+ days).
Dry it firstThe lid holds conditions steady, but it can only protect a harvest that goes in fully dry. Our 350W dehydrator gets mushrooms cracker-dry first, and silica gel canisters help in bags and smaller containers.
No. It's sized for wide-mouth jars only (Ball, Kerr and equivalents) and won't seal on a regular-mouth jar.
Aim for 50–55% RH for short-term storage of 1–90 days, and 30–40% RH for long-term storage of 90 days or more.
Start with one 5g pack, wait about 30 minutes and check the reading. Add the second pack if you need to bring humidity down for long-term storage.
No. It's for storing mushrooms that are already fully dried. Fresh mushrooms belong in the refrigerator.
Yes. It ships with a standard LR44 cell pre-installed, an easy size to find when it needs replacing.
No. You get the lid, sealing ring, battery and two silica packs, and it fits the wide-mouth mason jars you already have.
I normally use the Hygrolid but I decided to try this instead, I always store my excess mushroom in a jar, they keep better and plastic can breath still and tends to leave them soggy unless I put a ton of desiccant packs inside. This lid is nice and air tight! The silicone ring really helps! The digital display is easier than the analog and you don't need to calibrate it! I store my mushrooms at 20-25% humidity for long term storage and they always perform like the day I harvested!
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