When function seems to disregard creative substance.
Predictions are innately prone to err given reality's propensity to throwing rocks in our forward-moving bicycle spokes. This holds especially true for smoking.
Good Design Makes a Product Useful (enough to hold flowers while still maintaining its function as a water pipe).
Just because cannabis is a nascent industry about to enter serious business people's lexicon as a veritable helicopter ticket to the top of Money Mountain does not give existing cannabis artists and product designers license to ignore the principles of good design.