The burger patty is made in house using imported ingredients and locally sourced hand picked vegetables. All care is taken to prepare your burger 100% vegan as the local and western owner of the business understand the process. There is a cost associated with doing this. You are provided great service in a friendly and clean restaurant. Vietnamese people do not drink water from the tap. We use bottled water the same you buy in a shop yet we purchase it in bulk and serve it in glass bottles to reduce the impact of plastic waste . That positive approach is clearly lost on this customer along with the great service and atmosphere provided by our lovely staff. The focus is entirely on cost and not what has actually gone into providing great food . This customer was offered to fill all of thier water bottles free of charge when leaving but makes no mention of that . Given the amount of amazing positive feedback Nook eatery receives about the Veg/vegan burger it's clear the we didn't attract the right client on this day.