Not sure if they're what you mean, but there are Lucozade
lower sugar sports electrolyte drinks or High 5 tablets to mix with water. Only needed for extreme or endurance activities. Caffeine drinks, whether they contain sugar or not, are often labelled as unsuitable for diabetics, who may or may not take any notice.
Personally, I can't stand the taste if caffeine drinks, and only rarely use electrolyte drinks.