Why are your tealight cups made of plastic (PET)?
We have deliberately chosen PET cups because they are extremely durable and can be safely used allowing the added benefit of being able to self-extinguish.
In addition, PET cups are very stable, unlikely to catch fire and do not break or shatter, for example, when dropped, as would be the case with glass, which can lead to a significant risk of injury for you and your loved ones.