Step 1: Identifying the Parts
If you look at the top of the can, you should be able to identify the 3 key elements, which are covered by the next three steps:
Step 2: 1 - the Ring
Step 3: 2 - the Tab
Step 4: 3 - the Opening Section
Step 5: Putting It Together
To begin, slip the index finger of your dominant hand under the ring. Next, rest the thumb of your dominant hand on the tab.
Hold the can with your non-dominant hand so that the ring is facing away from you and the tab if facing toward you. Press down with your thumb while pulling your index finger up and toward yourself in an arcing motion , like so:
Use the same amount of force you would use to turn a key in a lock.
Step 6: Troubleshooting
1 - If the ring tab is still attached, you can push it back to its opening position and try the whole procedure again.
2 - If the ring tab had broken off, you can use your thumb or any blunt object to push the opening section open.
3 - If all else fails, you can always pour the soda into a glass through the narrow opening.
Step 7: Final Step
Once you have this technique down, you can open anything that comes in a ring-tab can.