Coffee Thermoses are a lighthearted collectible in Alan Wake, serving as a nod to the game's quirky atmosphere. While they don't offer any direct gameplay advantage or story revelations, collecting them contributes to your overall completion percentage and unlocks specific achievements. They are often placed in plain sight but sometimes require a bit of searching off the main path.
There are 100 Coffee Thermoses to find across all episodes. They are usually found on ledges, tables, or other surfaces in both indoor and outdoor environments. Keep an eye out for their distinctive red and white design. While not essential for progression, finding them all can be a fun challenge for completionists and offers a sense of accomplishment. There's no in-game tracker for individual thermoses, so you'll need to keep track yourself or use a guide.