The Fridge is a block added in the Kitchen Update of the mod. It have two parts : the Fridge and the Freezer.
The Fridge part allows you to store items into it and the Freezer permits you to freeze some items into others. At the moment, you can only freeze water into ice.
The Fridge have two variants : a dark one and a light one.
Crafting recipe
Dark variant
The dark variant of the Fridge needs four gray concrete blocks, four iron ingots and one chest to be crafted.
Place concrete blocks on the bottom and top corners, the chest in the middle and iron ingots in the top and bottom middle and in the middle right and left.
Light variant
The light variant of the Fride use the same shape as the dark one. Just replace the gray concrete by white concrete.
Freezer
The Freezer allows you to freeze items. For now, you can only freeze water into ice.
The Frezeer needs ice as fuel to work. Put the ice in the bottom slot and the block to freeze on the top slot. The result will appear in the right slot.
The Freezer GUI