Bests & Worsts Reviews from Amazon

I really do enjoy using this bottle, it's a perfect size, it's easy to hold, it's amazingly easy to drink out of, and it's super easy to fill up! I've been using this water bottle for about 6 months, the only problem I have with it, is the lid. It keeps the water in perfectly, but the rubber seal on the top builds up mold/mildew very easily! If I don't wash my water bottle every day, it can build up really fast. I accidently left my water bottle for about a week, and when I got it back, the rubber seal was built up with mold. I tried soaking it in soap and hot water over night, I tried soaking it baking soda, I tried soaking it in vinegar, I tried soaking it in bleach, and I tried cleaning it in the dishwasher, but none of this helped remove the mold. I attached the picture of what the rubber seal looks like right now, I wish I took a picture of it before I started cleaning it, but it's still really bad. Everything is perfect about this bottle, but I wish the mold problem did not exist, and it seems like others are having issues as well.