What can a hookah definitely do without? A hose. And if you prefer flushable silicone hoses, don't forget to choose a suitable mouthpiece for the hose and, if necessary, a connector. This is used to connect the hose to the hookah. Some hookahs are fine with a separate connector, others need a gasket. You can find the details of the specific hookahs in their detailed descriptions.
Hygienic mouthpieces can also be useful - you can use them when sharing a hose with other shisha smokers or for your customers in a shisha bar.