Great post @kus-knee and a great point. The cost of bottled water is ridiculous at some places and it would be far better for everyone to filter their own water, but that's not always practical. It's always been the case with airports and petrol stations, they're always going to take it a bit too far with pricing, but they probably have rental charges to pay that constantly go up every year. I remember speaking to one cashier at a petrol station and he said that they don't even make any money from the Petrol, that's why they jack the food and drink prices up so much. He was the cashier, so how well informed he was about the business, i don't know. Upvoted! ;-D
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Great points made @flatrider. Yes we should all have a good filter and "produce" our own water!