How can I safely melt bottles in an oven?

To safely melt bottles in an oven, first make sure the bottles are clean and dry. Preheat the oven to a low temperature, around 300-350 degrees Fahrenheit. Place the bottles on a baking sheet lined with parchment paper and put them in the oven. Monitor the bottles closely as they melt, and use oven mitts to handle them carefully when they are done. Remember to ventilate the area well to avoid inhaling fumes.