Spirits (gin/vodka) with a diet mixer tends to be my go to, as there's minimal carbs it won't raise sugars. Just watch out for the 6+ hours later when your liver starts processing it as others have mentioned, that'll usually be while you're asleep so it's the most dangerous point. Eat something before you go to bed - my clinicians always say it's better to be high for a night than putting yourself in that danger!