If you are lucky enough to live in a country where you can drink the tap water do so. Get a refillable water bottle, fill it with tap water and drink that.
Refillable Water Bottles
Check out which water bottle here
There are a number of innovative schemes out there that provide tap water refills for when you run out when out. You can find them here.
Outside The U.K.
Here are a list of places you can refill your bottle abroad
Of course, sadly, water in many countries is not safe to drink – you can find out where here. When this is the case you can
Steralize Your Own Unsafe Tap Water
We sterilise unsafe tap water water using a Steripen …. but when a bottle refill service is offered we will use that instead.
Plastic Water Bottle Bans
Links to interesting projects that are tackling the problems of bottled water
If You Must…
Buy bottled water, you can get it packaged in PLA compostable plastic bottles. More info here…