Everything in the Mt. Fuji museum gift shop was mostly blue with the classic white peak on top, including my gelato! My favorite thing we bought was a blue guitar pick -- when you play it, the blue paint wears off to show white underneath, making it look like Mt. Fuji's peak. So cute!
Siegfried: Yes, but he'll feel like he needs to get everyone one, so it's best to have someone with him to stop himself.
Master: Yes, and they make a list to make sure that they haven't forgotten anyone. It usually goes Spouses (Siegfried and Kriemhild), Other Romantic Ties (Karna and Georgios), Basically Family (consisting of Mash, Da Vinci, Salieri, and all the adopted Servants), and Dear Coworkers (the rest of the Chaldea Staff + Kadoc).
Kriemhild: Yes, but she's only getting those who she considers friends some. Sometimes she'll give Siegfried one.
Karna: Yes, and similarly to Siegfried, he'll also need someone to stop himself from getting everything for everyone. Or prevent the shopkeeper from giving him everything in the store.
Georgios: Yes, although he would also just stick to giving friends such things.