The rice is cooked without a pot at all — sealed inside a length of green bamboo and set directly into the embers, so the tube itself does the steaming.
Glutinous rice and water are packed into a section of fresh bamboo, plugged with leaves, and roasted slowly over an open fire until the rice steams inside its own natural container; the charred bamboo is then split open and peeled away in strips, leaving a fragrant, faintly smoky log of sticky rice. It's sold by roadside stalls across Sapa and the northern mountain provinces, often alongside grilled meat.