I can understand that for a family of 6 that would add up. I typically always have my own litre in my bag. Have never had an issue with keeping it on the floor near the table in casual restaurants....heck, at Zee Best, Kakao, Bikini, and the yacht club I even keep it on the table. No worries. No one has EVER said anything to me.

As we drink wine, we don't deal with ice cubes or anything like that. We do not get tap water, but that's just us. I will get a bottle of flat in a nicer establishment, but for two persons that is manageable.