GR translation: whisky glass tipped at the bright subarctic sky

[Mike Jing]

V142.8-12, P144.26-30   Here’s a medium shot, himself backlit, alone at the
high window in the Grand Hotel, whisky glass tipped at the bright subarctic
sky and here’s to you then, chaps, it’ll be all of us up there onstage
tomorrow, Ned Pointsman only happened to survive that’s all . . .

What does "tipped" mean here?