You must be mistaking me for someone else - I've only ever had one of these, the red one I attached a photograph of. It came as part of a small joblot of European glass. I'm not a fan of these vases, personally, so I wouldn't actively seek them out.
If your blue one had a Holmegaard label, then it was 100% put there by someone else after it was manufactured. These vases are very definitely German.