This is what I did:
Shortly before my guests arrived, I took my candles out of the freezer. (I recommend keeping them in the freezer for 24 hours or longer). My candles did not fit snuggly in the holders so I wrapped the bottom of each of the tapers with aluminum foil and inserted them in the holders. I got a nice tight fit and the foil was not visible to anyone.
I lit my candles and was ready for my guests.
My tapers burned cleanly for five hours! No drips! This has worked for me every time with only one exception. I tried this with expensive candles I bought from Crate & Barrel and had a drippy mess. They burned a much shorter time too.