Hi, so here is my story of getting rid of our son's binkey. We were camping, and as we sat around the camp fire, he began to goof off and pretend to throw it in the fire. And then... it slipped. Into the fire it went. We were horrified knowing that was the only binkey we had brought with us. He laughed about it. Then, at bed time, he asked for it and I'd say "Remeber, YOU threw it in the fire." And he was fine with that, he fell right to sleep without it. It was amazing! Even in the middle of the night, when he woke up, all I had to do was remind him, and he'd fall back to sleep. After one night, the binkey was no longer an issue and was never needed again. It was as simple as that.
So my suggestion to you is to get him to "accidently" get rid of it so that he's not mad at you for doing it.