During our renovations, I got curious about the reasons for a very deeply recessed window, with thoughts of being able to lower it to window seat height so it looked better. When we pulled off the interior wall panel, this bottle wall was revealed! Now we stood there exclaiming "What the heck?" for a few minutes before examining it closer. All the bottles are very solidly in there (someone knew how to mix concrete properly), and my sister tried drilling around the large bottle in attempts to get it out, but didn't have fantastic progress.
I really don't want to just take a sledgehammer to it, so I was after advice on the best method of removal please? The only thoughts I had was a small chisel and hammer, lol. I don't mind putting in the time to remove them properly as there's no rush. It would also be cool to preserve the bottles, the large one is an old Teachers whiskey bottle (my late fathers fave), and the 4X beer bottles could be used by someone else. All labels look to be from the 80's!
Thanks heaps in advance for your expert help!