According to Table 3, the plastic bottled Rich2 with a LV 26 for the Colombian EX prepared by UHT sterilization was stable. However, because the pH (6.3) was not adjusted in this case, the emulsion seemed to become unstable, and milk separation occurred depending on the kind of emulsifier used. The emulsifier used for Rich2 that resulted in the violent milk separation has a relatively small hydrophilic group compared with that of the hydrophobic group (Fig. 1). Therefore, it is suggested that as the hydrophilicity of the oil droplet decreases, flocculation more easily occurs between the oil droplets.