Sure. You could also open a payment channel and fund it with just enough coin for 1 cup of coffee. It would be a stupid thing to do, you would loose money vs. transacting on the blockchain & bloat BTC blockchain in the process, but yeah, technically you could.
If BTC tx fees ever become substantial, setting up a payment channel for 10 cups of coffee would make that coffee prohibitively expensive. So 100 cups is a reasonable number, I'm good with it.
Doing so for 1 cup of coffee does not make sense indeed. LN is not efficient for such. However, you have no calculations to back up any exact numbers (e.g. at exactly what point is it inefficient/expensive). You're part of the 'complaining is better than contributing crowd'.
The rest of your comments are simply "no ur rong," and, as such, deserve no response. Responding only because it pains me to see you reduce yourself to this, Lauda, sniping like a hurt little girl. Stop acting like a hurt little girl, Lauda, it's unbecoming.
Simiarily you think that "ur rite" without anything backing up your words. I've done nothing but reduce to your level. +1 for ad hominem attempt.
Update: Seems like I've wasted my time. Stop trolling.