| Δ0 | continuous small-sip water drinking itself | sipping water from a bottle all day, taking tiny sips every few minutes, constant small mouthfuls of water |
| Δ1 | other water-drinking patterns and session structures | chugging a full glass at once, drinking a large bottle in one sitting, drinking water only with meals, gulping water right after exercise |
| Δ2 | other hydration-related habits and beverage choices | carrying a reusable water bottle everywhere, drinking through a straw, sipping herbal tea, drinking sparkling water, using an electrolyte drink |
| Δ3 | other frequent small-intake habits unrelated to water | sipping coffee all day, grazing on small snacks, chewing gum constantly, nibbling bites of food between meals |
| Δ4 | other everyday health and wellness habits unrelated to hydration | taking short walking breaks, stretching periodically, napping briefly in the afternoon, checking posture regularly |
| Δ5 | ordinary daily activities essentially unrelated to health habits | organizing a desk, watering houseplants, folding laundry, listening to a podcast, sorting mail |