The leak-proof Chute has a wide mouth, like politicians, pastors and porn stars. The cap only requires a half-turn to open/close, and it has a cool feature where you can click it into the carabiner loop to keep it stowed out of the way.
The Chute is BPA free hard plastic that you can drop, throw and otherwise abuse all day long with no worries. The full lid comes off for easy cleaning, pouring in powders and adding ice, and there are clear markings for 8, 16 and 24 ounce levels (and their communist equivalents 250, 500 and 750ml). Top rack safe in the dishwasher, what more do you need? Oh yeah, this: it's on sale at the moment at REI.