These make absolutely no sense and are extremely wasteful if you're only making 1 or 2 cups of tea per day. They make a lot of sense if you're in an office ful

These make absolutely no sense and are extremely wasteful if you're only making 1 or 2 cups of tea per day. They make a lot of sense if you're in an office full of tea-drinkers though. Home users are more likely to be in the first group.