France was a colonial ruler in Laos. The industry of coffee in Laos can date back to 100 years ago, the time ruling by French. At that time, French found that the soil in Bolaven Plateau in Laos contained rich mineral materials and the altitude of the Plateau provided an excellent growing environment for coffee trees. So French brought in the coffee planting skill and began to plant a lot of coffee tree here.
As far as one way degassing valve know, during the World War II, the Bolaven Plateau was in the grip of war. The French left Laos one after another. After that, the Plateau was trapped in the civil strife and foreign war and the soil was polluted by heavy metals such as gunpowder, bullet shells, etc. More than that, the communist government of Laos thought that coffee was the products of capitalism, so the coffee planting and yield in Laos rapidly declined.
In recent years, the government of Laos gradually opened up the private industries and the coffee industry sprung up gradually. President of the Lao coffee association SinoukSisombat had sent the first batch of coffee bean samples which was from Bolaven Plateau to the coffee research institute of Montpellier in Southern France for identifying the quality of the coffee bean and got affirmation. That made Lao coffee stand out in the market.
One way valve believes that drinking coffee should be like tasting wine, first smell the aroma, and then try a small bite, that you can taste the essence of it.