I mean technically... I'm paying for the convenience of bottled water. I work late and I'll usually grab a bottle or two to take upstairs. Don't have to worry about coming back down to refill. Helps keep track of how many oz I intake. Sometimes I might find a surprise bottle around the house. This reminds me I should drink water. Can also grab a bottle or two running out the door. Never have to worry about bringing the cup back or cleaning it. Also premeasured amount for the flavored water packets. I think it's $3.50 for 40 bottles. .0875/bottle. Water filter cost $55 for 200 gallons. 200 gallons of bottled water = $164. Now to figure out how many cases of water I go through in x amount of months. 46 cases of water. Let's just say an average of 3 bottles a day. Round it around. Basically $164/year for bottled water. LG Water Filter being $55. Good for 200 gallons or 6 months. $110/year + tax + shipping. $50-$60 price difference is definitely worth the convenience for the year. So the frequency of convenience I get from bottles definitely pays off over the course of 1 year. Consider the amount of time going to get water from the fridge 1-2/times a day, me personally I get distracted but I wont add that time, cleaning the cup, looking for a cup, etc... Then also account for grabbing a snack. I binge eat shit snacks, so increase cost in healthcare and snack budget. Also produces more waste. Won't account for that either.
Let's say on average I spend 2.5 minutes going to get water and cleaning the cup. Then guessing for just half the year. 187 days. We know the actual number is more.
Let's average saving 2 minutes a day for those 187 days to utilize and pay for bottles.
That's 561 minutes in a year. It comes out to $5.88/hour to not leave bed and clean a cup for 9 hours out of the year.
That's a steal for a quality of life convenience. So... I don't think you could compare bottled water to nitrogen filled tires.
Unless you're talking about pure natural water harvested from 15,000 year old North Atlantic icebergs bottled in a frosted glass costing .49/cents an oz by the time it reaches your lips.
Now... the only issue is I get the bottled water for me and my dog gets filtered water. I just can't win.