Robust padding for glass jars (Pilton EH4)

These amazingly strong, air-cushioned cozies for glass jars are a must-have for any outing. They came with 1 kg glass jars of tahini in them, and they are really too good to throw away. Okay so they're plastic - not good for the environment - but help keep them out of the environment by holding on to one or more for life. I can't bear to recycle them (which is never 100% beneficial for the environment), so have loads of them and more coming every time we buy more tahini online. Could let go of one or two of the jars that fit snugly in them, if wanted.