Three pack of silicone replacement straws for ALL of our flip straw tops. The straws are all the same size, cut to fit our tallest Eco Vessel bottle. A ruler is included with the names and sizes of Eco Vessel bottles that come with straws clearly marked, so you can easily find your model and use scissors to cut the length you need. We suggest you err on the side of cutting a little longer, as you can always trim more if needed.