The tea bags can also be used to retain moisture for your plants. If you are planting things such as ivy or ferns you can line the planters with your empty tea bags before you add the potting mix.Your empty tea bags will absorb water and retain it longer. Another way in which you can recycle your used tea bags is to cut them open and use the tea leaves as part of your garden soil. This adds nutrients to the potting soil or top soil. Another solution is to use them hot or cold to relax your eyes. The tannins contained therein will reduce dark rings or puffy eyes by stimulating your blood circulation.