Vaseline, a greenish-yellow colored glass produced by adding uranium oxide to the batch, was produced during the Victorian era. It was made in smaller quantities than other colors and lost much of its popularity with the advent of the electric light. It was used for pressed tableware, vases, whimseys, souvenir items, oil lamps, perfume bottles, drawer pulls, and doorknobs. Pieces have been reproduced, and some factories still make it today in small batches. True Vaseline glass will fluoresce under an ultraviolet light, or otherwise known as black light.