RO bulk water is the practical refill-first option. It makes the most sense for repeat local customers who want a cleaner, lower-dissolved-solids profile and a straightforward refill rhythm.
RO / distilled water moves further into a stripped-back purification profile. That category works for customers who want a clearer process-defined baseline and who prefer a product that starts from a lower- mineral reference point.
Mineral and pH water is different. That category exists for taste, preferred profile, and a more intentional mineral balance. It should be framed around experience and composition, not vague miracle language.
Hydrogen- and ozone-focused waters sit in the specialty category. These products are best understood as differentiated process-profile options for customers already looking for those formats, not as universal upgrades to everyday water.
DDW stands apart from the rest. It is the most specialized product in the line and needs the tightest claims discipline, with published data, testing context, and a premium category framing that makes the difference clear without overstating certainty.