how does the sink hold H2O I do not see a stopper feature w/ the faucet

This sink faucet is suitable for pop up drain (not included), which can be open or closed simply by pressing the top of the drain mechanism up or down. You may purchase the matching pop up drains online or at your local or check the Faucet Accessories category on our website to order. According to your sink with or without overflow, please choose the drain with or without overflow.