I wonder what's in it?

The detective is still looking at this positively, but doubt is starting to creep in. The doubt is dismissed, though.

He glanced at the package. “I wonder what’s in it?” he murmured. “Still, that shouldn’t worry us. As far as we’re concerned, there’s no problem.”

Have a look at these examples.

She looked hopefully at the USB drive, with the Gummi Bear still attached. “Hmmm… would you be a dear and check that disgusting looking thing, please? Whatever on it, I’m sure it’s a good start. Couldn’t make our situation any worse, could it?” Fliss added, glancing at me with a half grin.

I pushed the door closed slightly. “I mean, he did mention that it might be dangerous. That I could get roughed up a little. But that’s not going to happen, is it? These folks need help getting off the toilet. I can almost do parkour!”

Write your own variation.