Let's compile a list of substitutes for sugar tablets for those who need them.
Skittles
Pros: lightweight and available at lots of places. Relatively long shelf life.
Cons: not individually packaged.Sugus like, store brand candies
Pros: lightweight, don't melt. Individually packaged. Cheap if purchased at the right places. I bought a bag of 30 at a supermarket in Portugal for less than 2 euros.
Cons: prices vary. For example, a similar bag costs 6CHF in Zurich.Chocolate bars
Pros: tasty not just as a glucose booster.
Neutral: packaging varies
Cons: most are of larger sizes. Melts easily.Granola bars
Pros: easily available everywhere. Don't melt much. Individually packaged.
Cons: usually larger in size. Contents vary. Lower glycemic.