There’s no ambiguity unless the sign had an arrow pointing to “the” soda as the subject. It obviously doesn’t because the soda isn’t visible while it’s in the fridge. It could be ambiguous as:
Please drink soda in[side] the fridge
But then pink highlighter wouldn’t get to feel clever 🥸👎
You’re almost as good at rearranging sentences as Master Soda.

Hey, I’m just reading it straight left to right.
The same way you finished your username?
Oh, that’s just my luggage combination.
“1-2-3-4-5? That’s the kind of combination an idiot would put on his luggage!”
The fixed version isn’t even right.
There’s no ambiguity unless the sign had an arrow pointing to “the” soda as the subject. It obviously doesn’t because the soda isn’t visible while it’s in the fridge. It could be ambiguous as:
But then pink highlighter wouldn’t get to feel clever 🥸👎
The forbidden soda (Freon R-134a)