If you usually buy products related to anime series there are online stores like Etsy where you can find a wide variety. On more than one occasion we have talked about this store since there are very interesting items. The only downside is that it is in the United States and shipping costs skyrocket the price, so buying a product for cheap is not worth it.
My Hero Academia
Neon Genesis Evangelion
Attack the titans
These very special Cat Nerds Creations bottles are priced at 62.36 euros the unit. Then you have to add 23.99 euros for shipping to Spain, so we are talking about a total of 86.35 euros. Let's say it is not very cheap. By the way, they do not accept exchanges or returns, this is something very important to keep in mind.