Can I put rocks or glass in the FireCan?

Yes! However, please make sure you only use lava rocks or glass that are specifically intended for fire pits and high heat applications. You can find these in most hardware stores in the patio/garden section. River rocks, stones, and lava rocks used for landscaping are not designed for high heat and can crack or explode if heated in a fire. 

Do not put any solid fuels such as wood into the FireCan. It is designed to safely combust propane only.