With Christmas around the corner, our list of coaster sets to make skyrockets, so we thought we'd show you exactly how we do it. We get the mould preheating in the oven to warm it up. This is especially important in cold weather, as the plastic won't flow properly and might result in failed injections. With the mould heating, we can load the plastic into the barrel. This mould needs 130g of plastic flakes. All our plastic comes from donations and collections from our local area, mostly from scho