Which of the following is not manufactured from high-density polythene?

Candles

The correct answer is option 3. Candles.

Candles are not typically manufactured from high-density polyethylene (HDPE). Candles are more commonly made from materials such as paraffin wax, beeswax, or other waxes. HDPE is commonly used for containers, pipes, and toys due to its durable and versatile nature, but it is not a material used in candle manufacturing.