8Pcs Wide Mouth Liquid Culture Lids,Plastic Mason Jar Lid with 0.22um PTFE Syringe Filter & 20mm Self Healing Injection Ports For Mushroom

These Bluwtpoclan liquid culture lids are a fantastic time-saver for anyone serious about mushroom cultivation or mycology. The 8-pack is a great value and fits standard wide-mouth Mason jars perfectly, creating a reliable seal that is crucial for maintaining a sterile environment. The pre-installed 0.22um PTFE syringe filters provide excellent gas exchange while keeping out contaminants, which is a major upgrade over DIY polyfill or micropore tape methods. I also found the 20mm self-healing injection ports to be very durable; they handle multiple needle punctures without leaking or losing their shape. One of the most important features is that these lids are made of high-temperature resistant plastic, so they hold up very well during a full cycle in the pressure cooker. I didn’t experience any warping or seal failures even at 15 PSI. The design is clean and professional, making it much easier to organize and monitor your liquid cultures or grain spawn jars. Having the filters and ports pre-assembled saves a lot of prep time and reduces the risk of human error during inoculation. Overall, these are a solid, reliable choice for both beginners and experienced growers looking to streamline their lab work.

I could easily make these myself but do I want to? I bought these alongside everything needed to make my own. Its time consuming and after making my own... I don't really care to do it again. These are way easier. The lids are durable plastic, so they don't rust. They seal perfectly and fit atop wide mouth mason jars. They are a perfect fit. The filters and the injection ports are easily replaced. You can purchase them here on Amazon. Effectively you never have to buy these again. Just swap out the little parts. No sealant or tools required.

This is a really solid product. The self healing injection ports work great and the filter allows for adequate air flow. The only downside is the plastic could be a little more solid and the filter kind of just sits snuggly on the top of the lid. It can be knocked off if you stack or move jars around, so you do have to be a little more careful. Overall I would recommend this product. I think In future iterations I would like to see some sort of locking mechanism for the filter onto the lid and upgrade the plastic quality.

Stood up to the autoclave. No warping no contamination. Will buy again

These are a must for LC

The value for these are worth it, and they work great! The seal is perfect, and they not only survived the pressure cooker, but also the syringe. They are very durable, and were able to be sanitized a second time when we came out very easily. The tops go on and off but fit snugly, making them very easy to use. Also, plastic doesn’t rust so you can use them over multiple times without corrosion.

These do not provide sufficient fresh air exchange (FAE) necessary for good mycelium growth. I started out with these lids and didn’t have a lot of success. Added some metal lids and plastic lids that I made into mushroom lids myself and saw a huge increase in my success rates. Recently cooked, sterilized and inoculated four quart jars of grain spawn together. Two with these lids and two with lids that I’d drilled holes into and added self sealing ports and filter patches myself. The two jars with the lids I made colonized in less than a week and were sent to bulk substrate. The jars with these lids are still barely showing any growth two weeks later. No signs of contamination, just ridiculously slow growth. I started swapping out these lids with my lids and saw an almost immediate explosion of mycelium growth immediately after. Even saw better growth in jars with unmodified jar lids. The reality is that these do not provide sufficient FAE. Also, the air filters get knocked off really easily. It’s basically impossible to break and shake without knocking it out.

Fits mason jars, and knock offs, very well. They are thick and solid with no "popping up" when tightened or pressure sterilized. My only complaint concerns the use of the cheap self sealing ports. These gray seals are prone to develop permanent holes after only a few uses and they are not very tight in the lid. Cleaning them too vigorously can pop them out of the holes. I highly recommend getting the .5" RED self sealing injection ports. The vent is also a very small diameter which doesnt allow much air exchange and can clog very easily. I recommend replacing them with good adhesive filters. These two changes make these lids 1000% effective for the purpose of making liquid culture and any grain spawn.