Zagreb Airport has set up complimentary water dispensers at two locations inside its terminal building to enable passengers to fill their empty reusable water bottles. They can be found in the departures area, past the security checkpoints on the third level, as well as in the arrivals area prior to passport control on level one. According to European Union regulations, water bottles do not have to be empty when boarding an aircraft but must be empty if over 100 millilitres during security screening. Apart from providing benefits for passengers, the water re-fill stations aim to promote the use of reusable water bottles and reduce the consumption of single-use plastic bottles.