Did you know that those two open-ended glasses are called shades or chimney? These are great for protecting candles from the wind on a day when you want to light one al fresco. Candle shades need to appropriately hold the candles inside with enough room between the flame and the glass.
Pro-tip: When lighting the candle, gently place the shade over the top of the candle. With your other hand, light the candle with a lighter or a match then quickly place shade on candle. Voila! Instant added elegance.