TOPIC: General question on interaction between Goblet of Saintly Surge and Natasha's N

Does Goblet of Saintly Surge double the effect Natasha's Nightcap in coaching room? Asking so I know if I should get both as well as just so I know when I am coaching.
I could see this going either way.

I figure if the two don’t work together in coaching it would be because the coaching room doesn’t count as a room in the dungeon.

In the past the ruling has been you can only drink the potion from one receptacle. So you can't drink 1 potion from both a Goblet and a Nightcap simultaneously. Similarly for scrolls, they can only exist in one container.

However there are other tokens that buff healing potions. For example:

tokendb.com/token/drinking-hat/
tokendb.com/token/hireling-baker/
These might stack with Natasha's?

tokendb.com/token/earcuff-of-aset/
tokendb.com/token/master-drinkers-gloves/
As you said coaching might not be considered a "room".

What is Natasha's Nightcap? I can't find the Token in tokendb. Is it a power or spell?