Should I buy a countertop or cordless water flosser?

Countertop models (like the Waterpik Aquarius) have larger reservoirs, more pressure settings, and stronger jets, making them better for daily home use and households with multiple users. Cordless models trade pressure and tank size for portability, USB charging, and shower-friendly use; reviewers consistently flag that cordless units require 2–3 refills per session.