Bonbons

Bonbons is a pastry shop in Academy City. It is famous enough to be featured in Academy City information magazine, Gakuen Toshi Walker.

Etymology
Bonbon is the French word for "candy".

Principles
As a pastry shop, it sells a variety of cakes for the customers. The cake-in-a-jar is the famous cake right before Daihasei Festival.

Daihasei Festival Arc
Misaka Mikoto visited Bonbons after receiving a magazine about it from Kongou. Here, she discovered one of her clones, Misaka 10032, who bought some cake for her other clones. The Sisters clone was worried that seeing them together was troublesome to the Original, but Mikoto quickly dismissed that remark. Then, the clone decided to give her cake to Mikoto, who had just missed out on the reserved queue from the cake shop.

At a certain hospital, Kuroko was disappointed about Mikoto not chosen for the opening ceremony. Mikoto already moved on from the issue and instead decides to deliver the cake-in-a-jar she brought as a gift. Kuroko was happy to receive the gift.

Dream Ranker Arc
Misaka Mikoto brought same cake for Misaka 10032 which Misaka 10032 had given to Mikoto. Misaka 10032 commented that the current famous cake isn't same cake Mikoto brought, but she received the gift anyway.