A great DIY project that is simple to put together. This DIY Self Watering Bottle Garden is an excellent way to recycle old plastic bottles. The best thing about this little garden is that you don't have to water it very often! If you don't have time to take care of high maintenance plants then this is a cool option. You will need to refill the garden with water approximately every 2 weeks. To create this garden you will need one large soda bottle and six smaller bottles. This one uses water bottles for the smaller ones but you can use anything that is the right size. Check out the images and video below to see how it is done.