The candles got a makeover! These are smaller in size, lighter in weight, and contained in beautiful brushed metal tins. The tins have little bump feet on the bottom to help protect surfaces from heat. The metal lids are convenient for extinguishing flame and for travel or storage. Unlike glass there are no worries about breakage and when the candle is finished the tin can be reused. We've burned these for multiple hours a day for several successive days. There are a lot of factors to how long a candle lasts, such as ambient atmosphere and frequency of wick trimming, but these have very good longevity for their size and fill an average sized room with lovely fragrance without being cloying or overwhelming.