A solution to guests being hungry/thirsty in queue lines.

[mev202]

If you watch video clips of queue lines (yes, I'm that sad) quite often there is a little trolly half way through that sells water or snacks. At the moment you can't attach shops to queue paths, if that could be changed, then as people are queuing, if the guests brain says "drink" as they go past the shop attached to the queue line.. etc.

It is a way to make more money too.

 

[Bitter Jeweler]

How would you make more money?
If you satisfy their hunger/thirst needs in the line or at the ride exit, one nullifies the need for the other.
If the line "snacks" don't fully satisfy, the price would be commensurate, so you are just delaying a full meal, and still not making more money. This could also drastically reduce business at proper shops.

 

[Anth08]

I have to agree with Bitter Jeweler here.
If you start putting some sort of shop/cart in the queue lines then there will be less incentive for guests to go to the actual shops that you spend time placing and creating buildings around. There's already issues with them not getting enough business if you place too many.

I still don't see why everyone thinks the guests getting hungry and thirsty in line is a problem, it's natural and I like it. If I'm going to wait in line for an hour I'm going to get hungry and thirsty.
I've also never seen any carts or shops along the queue to buy things while you wait.