Recruiting

Smart Water Bottle

Sponsor:

Kennesaw State University

Code:

NCT06259799

Conditions

Dehydration

Eligibility Criteria

Sex: All

Age: 18 - 35

Healthy Volunteers: Accepted

Interventions

Smart Water Bottle

Study Details

Brief summary:

Approximately 60% of males and 40% of females do not meet current fluid intake recommendations, which is associated with adverse health consequences such as obesity, diabetes, and chronic kidney disease. Newer technologies have been designed to promote fluid intake. "Smart Water Bottles" use mHealth technology to capture fluid intake behaviors automatically and provide cues to encourage fluid consumption. Studies using Smart Water Bottles have helped some individuals increase fluid intake to help reduce kidney stone formation. However, limited research has assessed the efficacy of this technology on improving fluid intake in college students. College is a time with the potential to form healthy habits that carry into adulthood. Previous work has also identified daily changes in morning urine color, thirst perception, and body mass, as simple, inexpensive indicators of daily fluctuations in water balance. Tracking changes in these metrics has the potential to provide participants with evidence of adequate or inadequate fluid consumption. Thus, the combination of prompting from a smart water bottle, as well as daily self-monitoring changes in hydration status, may encourage college students to increase daily fluid consumption.

Conditions

Dehydration

Study ID

NCT06259799

Start date

Apr 1, 2024

Status verified date

Aug, 2025

Completion date

Apr, 2026

Anticipated

Primary completion date

Dec, 2025

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 35

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Participants must report currently drinking less than the European Food Safety Authority Recommendations for fluid, as determined by an online pre-screening survey (<2.5 L per day for males; <2.0 L per day for females).
  • Has access to a cell phone which can download the app associated with the Smart Water Bottle.

Exclusion Criteria:

  • Currently trying to gain or lose weight
  • Have had surgery of the digestive tract
  • Currently taking diuretics (e.g., Thiazide, Loop diuretics or potassium-sparing diuretics)
  • Currently taking centrally-acting medications (e.g., anesthetics, anticonvulsants, central nervous system stimulants/amphetamines, muscle relaxants)
  • Report currently consuming at least the European Food Safety Authority Recommendations for fluid, as determined by an online pre-screening survey (>= 2.5 L per day for males, >=2.0 L per day for females).
  • Currently pregnant (females)

Study Design

Enrollment

30 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Prevention

Interventions and Outcome Measures

Arms

experimental: Smart Water Bottle

Participants in the intervention group will be prompted by the water bottle to drink (bottle will light up red) whenever they are behind on fluid intake recommendations for the day. The bottle will be linked to a smart phone application that participants will be instructed to download on their personal mobile device, but they will log into this device using a researcher provided username and password. The bottle will encourage male participants to consume 2.5 L and for female participants to consume 2.0 L of fluid. Participants will be asked to use this bottle to consume all water and enter any additional sources of fluid using the mobile application. The intervention group will also be asked to record their daily perceived thirst, first morning urine color, and body mass as a means of self-monitoring daily changes in hydration status, using a provided paper log.

no intervention: Control

The control group will be asked to go about daily activities as normal. They will not receive the water bottle and will not be asked to track daily measures of thirst, morning urine color, or body mass.

Interventions

Smart Water Bottle

Participants in the intervention group will receive a bottle which measures participant fluid consumption. The bottle will be set to recommend 2.5L for male participants and 2.0L for female participants, consistent with fluid intake recommendations from the European Food Safety Authority for each sex. Participants will be prompted by the bottle (bottle will light up) when they are behind on fluid intake recommendations. Participants will use a validated urine color chart, 9 point Likert scale for thirst, and measure nude body mass on their own each morning. Participants will be informed that higher values for nude body mass and thirst, and lower values for nude body mass each morning may indicate they are less hydrated day-to-day.

Primary outcome measure

  • Total Fluid Intake [ Time Frame: Pre and Post 2-week intervention ]
  • Changes in 24h urine osmolality [ Time Frame: Pre and Post 2-week intervention ]
  • Changes in 24h urine volume [ Time Frame: Pre and Post 2-week intervention ]

Central Contacts and Locations

Central contacts

Mitchell E Zaplatosch, PhD

4705787600mzaplato@kennesaw.edu

Locations

Kennesaw State University

Recruiting

Kennesaw, Georgia, United States, 30144

Contacts

Mitchell Zaplatosch, PhD

mzaplato@kennesaw.edu

More Information

Sponsor

Kennesaw State University

Last update posted

Sep 2, 2025

Last verified

Aug, 2025

Keywords

  • underhydration
  • copeptin
  • urine
  • water

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Kennesaw State University on 2025-09-02.