Can outside water bottles be taken into the park?

I was there this past Sunday, and they will let you bring them in.We had several bottles that we brought in.

Yes!

Yes you can. There are refilling stations but they are not well marked. I think you can get a tiny cup of ice water for free at any concession stand but it is easier to just refill a bottle at the refilling stations and water fountains

I went this past Thursday. I brought in a plastic water bottle and they did not care. I'm not sure about refillable

I seen people with them.