Well, it shouldn’t, it’s 100 % leak proof! You can throw it around, shake it off...or maybe even put it in your bag and flip it sideways really hard. Like, really hard! And not a single drop will fall out.
In case the Universe decide to spice the situation a bit and make your Mug leak somehow ... please get in touch with us and we’ll make sure to fix the situation. But first - please:
- check, if you closed your cap tight enough,
- clean and dry the canals on the screw and
- let hot steam evaporate for couple of seconds before closing the lid.