None. The Client will not allow you to stack any cumulative item beyond 100 items, and it won't prevent you from creating a stack until it has 100 itens on it.
Many years ago, I think before Tibia 7.0, for a brief period of time there were stacks of more than 100 gold. That was because Dragon Lords sometimes dropped more than 100 gold and they came as a single stack. This was later changed, of course. There are still players who claim to have these stacks with more than 100 gold in Antica, and the legend says that if these stacks are as much as moved inside the container they are in they'll split. This, however, hasn't been proven recently on video or anything like that.
As for the Theons mentioned in the comments: there are three items which represent Theons: 50 Theons, 7197 Theons and 200 Theons. These are regular items, with these names, so the numbers do not represent the amount of items as they do when you e.g. see "100 gold". These items have two peculiar characteristics: they have an invisible sprite and they vanish about 1 second after they are created and a character interacts with it. When they disappear, the corresponding Theons are added to the character's balance. For some reason, CipSoft decided to use this mechanic to have control over the amount of Theons players get from bosses as loot, as well as on their first battle against Lord Retro. Finally, it's worth mentioning that the name "7197 Theons" isn't random, the number is an Allusion to Tibia's Birthday, 7/1/1997 (in the non-North-American date format).