But just so this isn't a complete QQ post, let's give you a few tips for next time. That inn is usually where I stand, but it's pretty crowded -- it's definitely worth, after just picking up the quest, looking around the faction inn where you get the cooking daily as there's usually one or two in there. And I didn't know this, but apparently there are a few spawn points downstairs in The Cantrips and Crows tavern (so when you run down there for the Jewel of the Sewers, keep an eye out for glasses also). And there are four spawns in the Violet Hold as well (so you can stop by and grab those while picking up the Heroic and dungeon dailies).
This might help a bit, but the fact is that this is an annoying quest, made more annoying when someone swoops in and grabs that glass you were headed for. Bornakk rightfully says it doesn't need a nerf (and as more people get everything they want out of the cooking dailies, we'll probably see less competition out there), but that doesn't make it any less frustrating.