i am a type 1 diabetic which is very different from type 2, but, there are plenty of sugar free juices that have come around in the last few years, then anything thats diet, diet coke, fanta zero,7up free, coke zero, sprite zero, diet lemonade, theres also a diet dr pepper now aswell, then most cordials do a sugar free range now, ive had type 1 diabetes for 13 years and have never come across a cordial brand that i like that doesnt do sugar free.
just be wary of things that say 'no added sugar' rather than 'sugar free' as some no added sugar products can still have high amounts of natural sugars.
now when it comes to alcohol i cannot really help you, as a type 1 diabetic i can just inject for whatever sugar/carbs i have, so dont know where a type 2 diabetic would stand.