From Instructables >> "This self wicking tomato watering container is designed to be easily built by anyone. The watering system will manage your tomatoes for 2-3 days without being refilled. The cost of supplies, minus soil and tomatoes, is under $10. It can be built in under 30 minutes. It will provide you 'peace of mind' when you have to leave your tomatoes untended for your weekend travels. You can grow peppers in this system as well as bush variety vine crops."