any ideas on this pottery please.

size of pottery is roughly 3" tall, there are no markings underneath, no cracks or blemishes ( not that I can see ), there is a mark on the bottom inside, also what would be the best way to clean the inside without damaging it.

We always require a base pic for ID.

Cream cleaner should do it, unless it's soaked into the body.

here is the base of the pottery,

It's a modern manufactured planter from China and Taiwan.