Originally Posted by
Mama
It depends, in peasant/coach class, I would refrain from using the call buttons unless it is absolutely necessary (certainly not for drink refill, you are welcome to bring your own bottle of water onboard if you know you are a thirsty person). In premier cabins, I would use call buttons even if I just want one more ice cube.
That seems counterintuitive to me because economy class typically has a higher percentage of non-aisle seats. In the US, the TSA makes bringing your own bottled water on board a little bit of an obstacle (I know empty bottles are cool, but I'm not a fan of filling them in restrooms).