Best water purifier for office use, need recommendations

My office is switching water purifiers soon. I was asked to research options. Our current one is breaking down. Half the team has started bringing their own bottles instead of using it. I need something that can handle daily ue has a decent capacity so its not constantly being refilled and doesn't require frequent manual descaling or maintenance calls. Our facilities team is busy so we can't afford to have them constantly dealing with maintenance issues.

I'm also curious about the AMC (Annual Maintenance Contract) costs for office setups. This is where many water purifiers become expensive over time. I'm open to any suggestions and budget isn't a concern for us. What matters most is reliability.