Currently you can use tokens to buy Shapes or Blocks. In Shaper, press on the colourful shape graphic on the right:
At the top of the list you will see BUY NEW SHAPES:
Use the Lucky Dip with the INSERT TOKEN button on the right:
Or choose a shape by first choosing a shape pack on the left:
Then unlocking the whole pack with UNLOCK NOW or choosing a specific shape:
Same goes for Blocks in Blocker. We'll be changing this around soon though.. stay tuned!