There's a long history of 3D feltmaking, from slippers, boots and hats to yurts or gers for housing, and that tradition is carried on with a wide variety of products produced by feltmakers across the world.  

Lyn makes hats, slippers, handbags, jewellery and vessels all of which are 3D. 

Creating a 3D vase or vessel from wool fibres is an interesting exercise as it usually begins as a 2D process. Wool fibres are laid around both sides of a piece of plastic or cardboard cut to size (known as a resist) until it is fully encased. The purpose of the resist is to prevent the layers of fibres from felting together. It's necessary to get your head around the idea that the finished item will not have a front and a back as such but may be viewed from any angle once turned into a 3D object. It's a process that gets easier with practice.   

Once the wool is part felted it is cut open and the resist is removed. At this stage the felt maker can start to see the 3D form and begin to mould it into its final shape. Some people like to freeform the shape whilst other use objects like bottles and vases around which to form it. Below are examples of vessels formed in both ways.