>>2765423>This is the type of plastic champagne "cork" with wire to hold it in place I use, it's really strong, never had one fail ever.I once bought these shit corks for cider, and half of those could not hold pressure. They seemed airtight, but they did let the pressure go.
What I tested to work surprisingly well are the pic related cheapest smooth semi-soft plastic corks with cork-lookalike print on them, plus the wire you mentioned.
I had few similar to pic related as a leftover from some fancy-packed spirits (but unlike those in the picture, the head was wooden), and I tested them on another batch of cider. Then I just bought more of these and thrown away those semi-opaque white plastic crap. Just be sure the corks you buy are one size up from the bottle diameter – the plastic is semi-soft for a reason.
