Still lost at sea. Have been distracted by T-shirt ideas:
1. The obvious, just a T-shirt with a picture of the holy grail - The Mug
2. 15x15 Grid blank other than 6 theme answers - beverages: Margarita, Urbock, Guinness (of course), Gin Mules, Ledaig, El Diablo
3. A rabbit hole (not idea how to draw) and a red herring
4. A Pageant, perhaps depicted by Isaac wearing a sash with a tiara
5. Group shot of Yoko Ono, Margaret Cho, Marie Kondo, Yma Sumac, Laila Ali, Oona Chaplin,...