Xiang River Goddess Gourd

"Earth births, water nourishes." Using the gourd grants a moderate amount of 抗灼烧 and immunity from lava-covered terrain for a short duration.

From Webbed Hollow's The Verdure Bridge Shrine, cross the green bridge and turn left. Continue forward and you will hear two lanterns talking. Get closer and a cutscene will start. After that, enter the area head and loot all chests. The gourd is in the second chest on the right.