I purchased this water bottle approximately 6 months ago and have used it only a handful of times as it's on a rotation with my other bottles. After 4-5 washes on the top rack, the straw/straw seal no longer works properly. No matter how many times I adjust the straw, I sip up more air than water. The bottle also leaks on occasion for which I cannot find the source (possible related to the straw/straw seal).