How to Choose a Water Bottle for Hiking
How to Choose a Water Bottle for Hiking
A water bottle is one of the most important things you'll carry on a walk. It's also one of the easiest to get wrong. Too small and you're rationing sips by lunchtime. Too heavy and you feel it on every climb. Leaky lid and your lunch is soggy.
Here's what to look for, how much to carry, and how to keep it clean.
What should you look for in a hiking water bottle?
Capacity. How much it holds decides how far you can go between refills. More on sizing below.
Weight. Every gram counts on a long climb. Remember the bottle is the light part. Water weighs a kilo per litre, so carry what you need, not what you might need.
Insulation. An insulated bottle keeps water cold on a hot day and drinks warm on a cold one. It adds weight, but it's worth it for many walks.
Durability. Bottles get dropped on rocks, jammed into packs and left in hot cars. A bottle that dents, cracks or leaks after one season isn't a bargain.
Lid type. The lid is where most bottles fail, through leaks, lost caps or awkward drinking. It's worth more thought than most people give it.
Ease of drinking on the move. If you have to stop, take your pack off and unscrew something, you'll drink less. Pick a bottle you can reach and drink from easily, so you actually stay hydrated.
What size water bottle do you need for hiking?
As a rough starting point, plan on about half a litre per hour of walking in mild conditions.
Then adjust:
- Hot weather or full sun: carry more. Exposed tracks with no shade can easily double what you drink.
- Steep climbs: more effort means more sweat, so carry more.
- Cool, overcast days: you may need less, but you still need to drink. People often forget when they don't feel hot.
By trip length
- Short walk (1 to 2 hours): 600ml to 1 litre.
- Half-day walk (3 to 4 hours): 1.5 to 2 litres.
- Full day (6+ hours): 2 to 3 litres or less if you can refill safely along the way.
NZ trail considerations
- Exposed tracks dry you out. Ridgelines, tussock tops and coastal tracks often have little shade, and the sun is fierce. Carry more than you think on these.
- Don't count on streams. They can dry up in summer, and water from streams and lakes should be treated or boiled before drinking because of bugs like giardia.
- Hut water isn't guaranteed. Many huts have rainwater tanks, but they can run low, so check before you go and treat the water if you're unsure.
- Weather changes fast. A sunny morning can turn into a cold afternoon. Having a warm drink on hand is a real comfort.
Many walkers carry two bottles rather than one big one. That spreads the weight, and if one leaks or breaks, you still have water.
Insulated vs non-insulated
Insulated bottles have a double wall with a vacuum between the layers. That keeps heat from getting in or out.
When it's worth it:
- Hot summer walks, where cold water makes a big difference and you're more likely to keep drinking.
- Winter or alpine walks, where a hot drink at the top is a morale boost and helps keep you warm.
- Day walks, where a little extra weight doesn't matter much.
Trade-offs: insulated bottles are heavier and usually hold less for their size because of the double wall. They also don't squash down when empty.
Non-insulated bottles are lighter and simpler. They're a good choice for long multi-day trips where every gram counts, or when you're refilling and treating water often.
The simple rule: for day walks, go insulated. For long multi-day trips where weight matters most, go light.
What material is best for a hiking water bottle?
Stainless steel
- Strengths: very tough, doesn't hold flavours or smells, easy to clean, and it can be insulated. It will last for years.
- Trade-offs: heavier than plastic, can dent if dropped hard, and often more expensive.
Plastic (BPA-free)
- Strengths: light, cheap, and you can often see how much water is left.
- Trade-offs: can pick up tastes and smells over time, scratches can trap bacteria, and it can't be insulated in the same way. Make sure it's BPA-free.
Aluminium
- Strengths: very light and fairly strong.
- Trade-offs: dents easily and usually needs an inner lining, which can wear or crack over time. It also isn't usually insulated.
Our take: for day walks, a stainless steel insulated bottle is hard to beat. It's tough, keeps your water at the right temperature, and doesn't leave a taste.
Lid types and why they matter
Screw top
The most secure seal and the least likely to leak in your pack. Slower to open on the move, and caps can get lost if they're not attached.
Flip lid
Quick to open with one hand while you're walking. Good for staying hydrated. Check the seal is solid so it doesn't pop open in your pack.
Straw lid
Easy to sip without tipping your head back. But straws are fiddly to clean and can grow mould if you don't take care of them.
Wide mouth
Easy to fill from a tap or stream, easy to add ice, and easy to clean. Some people find it harder to drink from while walking without spilling.
For hiking
Look for a lid that seals completely so nothing leaks in your pack, but still lets you drink easily without stopping. A screw-on lid with a built-in drinking spout gives you the best of both.
How to clean a hiking water bottle
- Every day: rinse it with warm soapy water after each walk. Don't leave water sitting in it for days.
- Take the lid apart: most mould grows in the lid, around seals, spouts and threads. Pull out any removable seals or parts and wash them separately. A small brush helps here.
- Deep clean every so often: fill it with warm water and a spoonful of baking soda, or a splash of white vinegar. Leave it to soak for a few hours, then rinse well.
- Dry it properly: let the bottle and lid air-dry fully, apart, before putting them back together. Trapped moisture is how mould starts.
Long-term care
- Check the care instructions before putting it in the dishwasher. Some bottles and lids are fine, others aren't.
- Replace worn seals if the bottle starts to leak.
- Don't put insulated bottles in the freezer or microwave.
- Store it open, with the lid off, so it can breathe between uses.
Swanndri's water bottle
The Swanndri Water Bottle 600ml is built for day walks and everyday use.
It's double-wall vacuum insulated, so cold drinks stay cold and hot drinks stay hot. The no-sweat design keeps your hands and pack dry. A screw-on, three-position lid gives you a secure seal, and it's dishwasher safe for easy cleaning. It also fits most standard car cup holders, so it moves easily from the car to the track.
At 600ml it's a great size for shorter walks or as one of two bottles on a bigger day. It comes in Dark Olive and Pink Salt.
