Thank you for reaching out about this. One thing that may cause that is closing the straw too fast after drinking so the water gets stuck in the straw and come out. Try closing your straw slower and letting the water travel back down in the bottle. Let us know if the issue still persists and send us a video of the leak at service@thehydrojug.com
“I love this mug and it's so nice to throw into my gym bag without worrying about it getting my things wet ,I also like the rubber bottom that helps to keep it in place when it's standing up. the only negative I have is that the light can be hard to unscrew sometimes and the silicone is starting to rub off because of it around the edge of the top after only having it for a month”
