A Wardian Case also known as a plant terrarium.
If you’ve never used an indoor terrarium to grow houseplants indoors, then don’t! Because you might get hooked, it is so easy and enjoyable. The glass case holds in moisture, so you can literally go weeks or sometimes months without watering your plants.
Terrariums, also known by the term Wardian Case because of the English inventor, are terrific for humidity-loving plants like ferns and African Violets. But almost any type of houseplant will thrive inside a terrarium, so they are a great gift for people who never thought that they could keep a houseplant alive.