My friend had the idea that you could even use a soup can as a planter. That would be a great way to recycle those cans!
These cacti are very easy to care for. Just plant them in their soil and add a little bit of planting soil. Water once a week by placing a small ice cube into the planter and letting it melt. I would also take them off the fridge once a week and placing them near a window to give them some sun.