Hi Orin,
Thank you so much for visiting planDisney with your question. I am happy to help you think about what to take with you on your Walt Disney World vacation!
Yes, you can take your water bottle into the Walt Disney World theme parks. My family always brings our water bottles with us in our backpacks. Staying hydrated is so important, especially in the heat of Florida and with all of the walking that is required on a theme park day! Your Yeti water bottle should be fine; you just need to avoid glass bottles per the Walt Disney World property rules.
You can refill your water bottles while in the theme parks. There are some water bottle refilling stations available in the theme parks. There are also often ice water stations set up near quick-service dining locations, and quick-service dining locations will also give you a complimentary cup of ice water if you ask that you can use to refill your water bottle. My family will often request these cups of icy cold refreshing water to use to refill our water bottles!
There are often souvenir sippers available at Walt Disney World; however, the design and availability of these are subject to change. If you want to purchase a refillable mug, you might want to head to a Walt Disney World resort hotel. The resort hotels offer refillable mugs that are a great size and form factor for taking with you to the theme parks. You can also often find tumblers or other mugs at many Walt Disney World merchandise locations.
I hope that this information is helpful for you, Orin. Please feel free to come back to planDisney if you have any further questions!
~ Mona Leigh
