Considering the message’s medium, this is assurance for tourists who are wary from prior experiences with the “locally calibrated” orange juice suited for Thai tastes. All knowledge has a price associated with its acquisition, and I’m interested what that process for this juice stand owner; was such knowledge acquired passively through watching the wincing faces of non-locals as they experienced the disconnect between their expectations of how orange juice “should” taste based upon past experience (sweet) versus the present experience (salty)? Or was such knowledge acquired more actively, or perhaps even forced upon the owner by a non-local (or perhaps several over the course of time) voicing their dissatisfaction with the orange juice and/or demanding a refund?