My lad, but of course much older, has 3 dextrose tablets. They are lovely, I sneak one occasionally 😱 They come in all sorts of flavours (orange, lemon, tropical, blackcurrant and probably more - orange is lovely) and are chalky but kind of cold tasting and crumbly. They melt quickly in your mouth. Try them yourself! Or Glucotabs are the same kind of thing, they are good because they come in a plastic tube thing so good to keep safe and dry and therefore easy to throw in a bag and carry around. With the dextrose tablets they are just in a paper/foil wrapper like other sweets so once open it's hard to keep the rest of them clean and dry. They are quite expensive though at about 65p a pack, but then again, how much are Jelly Babies or Fruit Pastilles? Probably not a lot cheaper actually.
With Jelly babies, my lad would have just gobbled the whole pack. If you can resist eating them then fine, but if not, something looking more tablet-like might be more sensible. You could probably find a really tiny container somewhere and just put a few in. My lad used to have the coke, but he did find when shaky it could be hard to drink the coke withough spilling it, if indeed he could manage to open the can in the first place with the shakes!!
We incidentally, were told only 2 years ago that we SHOULD follow up with the 15g slow acting carbs! It really still amazes me how advice differs so much from area to area. Mad.