51 years on insulin, I have had a 'few' hypos in my time.
Unless you have nothing else available, avoid anything sweet with fructose in it as it is bad for your liver. Avoid sucrose as it is bad for your teeth.
Although the sweet liquids suggested might be OK for the person to use themselves, if and only if they can co-ordinate well enough, liquid is a nightmare for someone else to try to give you.
Glucose jelly beans, (about 3 g carbs each), glucose tablets, glucose gel (more expensive but easier for someone to feed into your mouth) are the stand bys, The gels could also be used in the wet, if previously unopened, and of course, no-one on insulin would be crazy enough to go skin- or scuba diving !!
If you run out of hypo supplies away from home just stock up on anything with sucrose or glucose in it. Fat slows absorption so chocolate, nut bars and milk are not the best immediate choices. Once the 'quick stuff' has gone in, I note that some educators talk about adding in a slower acting type of sugar, e.g. bread, biscuit etc to prevent a hypo occurring later. Afterall once the insulin is injected you cannot extract it !!
If I have had a hypo I do not drive or use machinery or make important decisions for at least 2 hours to allow the after effects on my brain to settle and only ever drive with BSL > 5 mmol/L.
Once you are well again the detective work starts - to work out why the hypo occurred and how to prevent it happening again. Most diabetics I have spoken with feel down and embarrassed by the event of a hypo. It takes time to recover and to overcome those feelings. Learning to remember the funny parts of an episode can help to overcome this. Laughter is always the best medicine !! Best Wishes