I just bottled my Saison with these. They were a great alternative to bottle caps because the champagne bottles I got as a gift had too wide of a neck for my bottle capper. They seem to be made of a really good plastic and intend on reusing them and just getting new cages. I think this is about on par with the cost of caps especially when a 750ml bottle is going to hold more than double a typical 12oz. The only issue I had was that I am a pretty skinny girl and pushing these in by hand were not an option. These actually went in with ease when I used a rubber mallet! Honestly, if these would've been easy to push in I would have been alarmed. I am really happy to have found an option that allowed me to use my champagne bottles without buying any additional equipment.