I also require anything in a 'bottle' to be provided from home ... IME it encourages them to wean off that quickly

There is no way I could in conscious allow a child to drink 16-24 oz of milk in ONE SITTING specially so close after presumably eating lunch that is creating unhealthy eating habits and IMO is teaching a child to 'eat' to self soothe to sleep rather than learning to actually fall asleep in a healthy manner. I personally would feel obligated to share resources / articles with the client that promoted healthier options for dealing with their child diet and sleep habits.

Once a child has transitioned to a cup I provide access to 2 serving of dairy per day as per the Ontario Day Nursery Act requirements for a child in care more than 6 hours a day based on the Canada's Food Guide ... which I do not always agree with but it is the guiding document we are suppose to use

A serving size for a child over the age of one but under the age of 6 is 125 - 175 ml .... so that is only 250 ml to max of 350 ml.

http://childcarelearning.on.ca/child...oom=24&item=74

This does not necessarily all come as milk to drink in a cup because dairy can be yogurt or cheese, cottage cheese, smoothie, cream sauce in casserole, milk on cereal and so forth and well.