Do you think that adding drinks to a child's candy bag is a good idea? I'm thinking of Capri-Sun because I always see children sweating while running about. It's a delicious drink with all the flavor of candy while hydrating a bit. Of course, I'd give out a bit of candy as well.
I think you have a swell idea. Nonetheless, it could cost a lot more. For instance, those specific drinks you mentioned are quite expensive compared to candy.
Buy a surgical glove and put water inside it. You can use it to make a hand shaped ice which is a great decoration for Halloween drinks. Surgical gloves are very cheap so it is a nice decoration idea.
I like the idea of having the drinks look like some bloody mixture, and that ghost print is pretty creative too. I am pretty siple but maybe something like this would be a nice change this year.