The quick answer: Water is perfect and zero carb, as is coffee and tea (without sugar, of course). The occasional glass of wine is fine too.
Check out this visual guide for more good options, and what to definitely avoid, at https://www.dietdoctor.com/low-carb/drinks 
Low-Carb Drinks – the Best and the Worst – Diet Doctor
Low-Carb Drinks – the Best and the Worst What do you drink on low carb and keto? What are the best options, and the most common mistakes? The quick answer: Water is perfect and zero carb, as is coffee and tea (without sugar, of course). The occasional glass of wine is fine too. Check out…