automatic watering system for houseplant?

Could someone suggest an automatic watering device for house plant? I prefer something that does not require electricity and is more or less foolproof (less chance of over or under watering).
The plant is labeled "Chinese evergreen". It needs only spoonful of water every few days.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.