At least here in Europa NA beers have improved wo much in the last few years. I literally don't know when I last drank one with alcohol when I just felt like drinking a beer (as opposed to when I wanted to drink alcohol).
And since OP likes it fruity, (NA) Radler/Shandy is just great. It's 50:50 (NA) beer and lemon soda mixed. This was one of the original ways to get a fruity beer with a lower alcohol content (since the soda doesn't have any) when NA beers weren't good yet, great for a hot summer day.
Yes, a faraday cage does work. But note that modern wifi uses high frequencies, which means fairly small waves (edit: of about 5cm). That means your faraday cage needs a meshing of maximum ~~~2cm~~ 1.25cm. The tighter the less signals it will let through.
Essentially, any mesh storage box should do the trick.