Their tonic water of choice is easy to get at any grocery store.

I did not want to be the one standing at the bar stammering immaturely about my drink order.

I quickly picked up what the classic gin and tonic was putting down.

Side view of three glasses of tonic water with lime pieces on a wooden tabletop next to a napkin and bar equipment

Simply Recipes / Getty Images

I never really branched out when it came to the tonic water, though.

A less-sweet tonic water gives you more options when youre mixing up a drink.

Flavor is a major consideration for all three bartenders.

Side view of a four pack carton of Fever-Tree tonic water

Simply Recipes / Fever-Tree

Bubbles were almost as important as flavor to the bartenders I spoke with.

Van Nostrand recommends using …Fever Tree tonic in an espresso tonic.

I like mine with a sprig of fresh mint for an herbaceous pop.

Conway also uses Fever Tree for espresso tonics.