[header] How to open a beer bottle with a key [title] Grab the neck with your non-dominant hand. [step] You should be holding the bottle securely so that it doesn't slide in your hand when you push against it. Don't worry about squeezing it too tight, a firm grip is enough! [title] Put a strong key, like a car key, under the cap. 
[step] This is not a job for a small file cabinet key or an aluminium house key. Pick a strong, larger key like a car key or a heavier office key.