SealVax 15-Bags set, Vacuum Device & Liquid Isolator

Some of the bags leak

Since I have 15 bags I've only used about 3-5 extensively. I found that one of my medium size bag does not hold a seal. So air goes back into the bag. I'm unsure if I'm doing this wrong but the other bag do a hold a seal.

I LOVE these bags. Still have the original set I bought a few years ago, I just needed more for storage.

They work really well. Bags are bigger than expected. I had a failure of one of the vacuums and Support replaced immediately. I love using for leftover avocado. They wash easily in hot soapy water. Not cheap but I think you get what you pay for!