> don't need to be tipped I was at a sports stadium last month and I went to get a bottle of water - the whole thing was completely automated. I picked up a b

> don't need to be tipped I was at a sports stadium last month and I went to get a bottle of water - the whole thing was completely automated. I picked up a bottle of water off the shelf, scanned it and presented my card, no human involved. It still asked for a tip.