Undercounter water delivery system is designed for dispensing drinking water in homes, offices, hotels, sports clubs, and other public spaces.
Water is dispensed via a faucet (mixer), and all the system's technical components are located under the countertop.

BRITA Extra C-Tap: https://www.brita.co.uk/water-dispensers/products/extra-c-tap 
Marco FRIIA HCS: https://marcobeveragesystems.com/products/friia-hcs/#marco_product_page_overview