Contigo Autoseal, hands down.
Lots of people at the office I used to work (engineering/construction firm) at had these. A coworker got me one for Christmas and I officially became a member of the cult for these things.
They're indestructible, mine has survived lots of drops and knocks from roof of a car onto gravel. …
Contigo Autoseal, hands down.
Lots of people at the office I used to work (engineering/construction firm) at had…