Supposedly once affixed with two tiny loop handles through heating, this delicate eggshell-thin vessel appears to be related to a small group of glass vessels found in the stupas of Buddhist temples; perhaps they were used as reliquaries for the ashes of the Buddha or Buddhist saints. See, for example, a small bottle unearthed from a Tang stupa at Ningan, Heilongjiang province, illustrated in An Jiayao, 'The Early Glass of China', in Robert H. Brill and John H. Martin, eds, Scientific Research in Early Chinese Glass, Corning Museum of Glass, New York, 1991, fig. 18.