Knock Knock: there is a new “secret cocktail door” this Mariners season at T-Mobile Park. Despite its hidden location, it’s already become a must-do activity at Mariners home games this year.
The feature is exactly what it sounds like: a small wooden door, designed in the shape of home plate and marked with an upside-down trident. Next to it, a simple sign with the menu reads “Knock Knock.” Fans who happen to find it can knock twice and be rewarded with a specialty cocktail.
On Opening Day, the drink of choice was “The Atmospheric River” ($23), a playful mix of Tito’s vodka, soda, sweet cream, and blue raspberry flavoring, finished with a fluffy cloud of blue cotton candy. On another night, the offering shifted to the “Mary Meal” ($25), a fully loaded Bloody Mary topped with a slider, bacon, crunchy bites, and more. You never know what you’re going to get, since the secret cocktail changes from game to game.
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This hidden bar is just one example of how the Mariners are adding a playful spin to the ballpark’s culinary experience this year. Another viral addition to the 2026 season is a souvenir food container shaped like a Washington State Ferries boat. For an extra $8, fans can upgrade classics like nachos, fries, or chicken tenders into this collectible vessel that doubles as a keepsake. The ferry boats sold out partway through the season but have since been restocked.
Food and drink options are also expanding in a more budget-friendly direction. The 2026 Value Menu has been expanded to include 15 new items, with snacks starting at just $3. Fans can find bites from local favorites like Ivar’s, Ballard Pizza, and Tamari Bar, along with 15 beer options (including craft and nonalcoholic choices) priced between $5 and $8.
If you find the secret door and enjoy a cocktail you can share it online with the hashtag #SEAcretdoor, but you’re asked to keep the exact location a secret so as not to spoil the fun of the hunt for other fans: “Keep the secret door a secret. Post the pour, not the door,” the sign requests.
Also note that the door isn’t open every game. But if you find a line forming in front of a wall at a Mariners game this September, knock twice and see what you get!
Here are the final Mariners home games at T-Mobile Park in September 2026:
- Thursday, September 3 to Sunday, September 6 vs. The Athletics
- Tuesday, September 8 to Thursday, September 10 vs. The Rangers
- Tuesday, September 22 to Wednesday, September 23 vs. The Astros
- Thursday, September 24 to Sunday, September 27 vs. The Angels
