I post lots of ideas, but once in a while I am shocked - shocked - that a particular item doesn’t already exist. Case in point: this thermos/beverage container fashioned after a Duracell coppertop. Considering our dependency on coffee as a source of energy, it makes perfect sense. It also helps that the design of the battery closely resembles your typical thermos.
The protruding contact on the top of the cup is spring-loaded, allowing the cup to sit flat on surfaces.
Dave's Geeky Ideas 
Nice… I can’t wait for someone to try and put these in a giant flashlight.
Cool Idea! 😀 I’d like to have one of those!
This is pretty cool! I know it’s a big advertisement for Duracell, but still. I want one!
Yeah it is a billboard, but I think the humor is more apparent than the brand here, imho.
SHUT UP AND TAKE MY MONEY! Please…?
You know, this idea would also work great as a sports bottle, with the button on top acting as the pull-up nozzle that are on sports bottles.
why cant i order this??
Drinking up that battery acid 👌