Could drinking orange juice unlock finding a Lost Hook at the secret fishing spot at the docks? I found one today after drinking OJ yesterday. Then I went to the portrait gallery with a parasol and didn't get any parasol techniques.
Edit: Nevermind. I picked up Open Parasol after unequipping my portrait guidebook. False alarm.
Edit2: On the other hand, I received the Open Parasol adventure twice, even though I only drank one orange juice yesterday. Either orange juice charges are bankable or learning Open Parasol doesn't use a charge. Hmm!