Supposing the Captain had been talking to her when he explained the use of the flasks content, Silja gingerly took it and said "Thanks, Captain...".
She had only so much as heard of such potions, and somehow always filed them under "things completely out of your reach", like the invisibility cloak or the stealth ring or the legendary Hood of Shadows...

She looked around, at the people and how they were examining their new items. It reminded her that someone was putting a lot of money into this, and she wondered if those money givers had reliable information that they weren't putting it into an expedition that would end up as a really big amount of driftwood.

"Hoher Sinn liegt oft im kindischen Spiel." (Friedrich Schiller)