We've now got together the full list of banned and limited items for transferring to Survival's new worlds.
If you haven't read the original 1.18 update post - go do that. There's a lot of stuff happening in the near future.

One quick reminder before we get into the items: We will not be able to update immediately. It can take quite a while for many of the tools and plugins we rely on to update. So even though the vanilla update will be out next week - we will not be able to update for a while. Thanks for your patience.

The item transfer system

By default, you can take up to 3 double chests of items, but you can get up to two extra double chests by voluntarily downgrading your rank:
Go down one rank gets an extra double chest (4 total)
Go down two ranks to get two extra double chests (5 total)

Contest trophies can be transferred by out staff without taking up a slot - and are exempt from the item restrictions below.

Below is a list of the banned and restricted items.
You also cannot take any over-stacked items (ie. items that shouldn't be stackable shouldn't be stacked in your transfer chests).
When adding items to your transfer chests you'll be notified if anything will not be permitted.
Any items over the limits will be removed when the worlds reset.

The item transfer system will open up soon™
We'll post instructions on what to do here once it's ready.