I recall seeing a clip showing sabrage performed with the foot of an ordinary (-looking, at least) champagne flute, after which it was poured into the same (fully intact and non-broken) glass. I found that very impressive.
I suppose it is possible - though I'd be distinctly nervous about doing it without an armoured glove in case the stem snapped. The art is in providing a sharp impact to the point where the bottle's seam meets the base of the swelling at the bottle's top.
