My zojirushi has a lock on it, has never leaked. I can throw it in a pack and not think twice about, and it keeps coffee almost too hot!
On the Zojirushi - Open the lid, set the mug down, knock the mug over and result is spilled liquid.
On the contigo - press the button to open the lid, set the mug down (opening automatically closes), knock the mug over and this results in NO spilled liquid.
I have only seen Stanley and Contigo have the “dead man” opener. And I used to use a Stanley. It is not as robust as the Contigo.
I have Zojirushi and use it for outdoors. Never near my laptop though.