100% recycled glass terrarium gardening set with cork and stainless steel gardening tools. A terrarium is like an aquarium, but for plants instead of fish. With this you can create your own miniature garden or forest, enclosed in its own little world. The terrarium is made of recycled glass bottles. Recycled glass is manufactured using less energy, raw material, and additives, than what is required for making traditional glass. Recycled glass, Cork, Stainless Steel.