Planting in Bags

I was looking through a gardening catalog and saw another way of planting--it's in bags! You can see that there are drainage holes so the plants don't get soggy. It is reusable, and once empty, collapsible. This would be good for an apartment balcony, where you could garden during the summer and then remove the bags in the winter, with the stored bags not taking up much space. Bag planters would be nice where you want to be able to move the plants, but don't want the weight of the pots. Keep in mind that if you use them here in the Valley during the summer, they may need to be watered more than once a day.