The summers are very hot and humid where I live. Looking for an insulated water bottle that will keep my water cold for as long as possible.

Any recommendations?

Recommended insulated water bottle - Bike Forums
I have better luck using Google and then add Bike Forums at the end of what I'm trying to find. Usually takes me right to what I need.

I have better luck with BF then Google. Thanks for the link, but it's six years old. It's a good starting point, but maybe there are some newer and better products?

AFAIK, the leading contenders for insulated bottles that fit into a standard bottle cage are still the 21 and 24 oz. Polar and Camelback. Either works well. In 85-90F temperatures, an uninsulated bottle filled with ice before leaving will get to ambient temperature in an hour; with either of the insulated bottles, that'll extend roughly to two hours.

I did a careful "study" where I loaded one of each bottle with the same number of ice cubes, drank the same number of swallows from each at almost the same times, and determined the Polar bottle still had ice left, while the Camelback's residual water was all melted after two hours. From that I concluded the Polar was the better bottle. Another frequent poster here conducted their own similar experiment and decided the Camelback was better. So take your pick (or buy the one that's cheaper).

An insulated hydration pack will hold a lot more ice and water, and if it's well insulated my last another hour or two. But they're not as comfortable in warm weather on my back -- YMMV.

any insulated bottle filled with ice

CamelBak 25 oz. Podium Chill. Freeze overnight. Just make sure not to fill it to the brim before you freeze it.

How long do you ride? I don't worry about keeping drinks cold any more for cycling. In my 95°F summers that are coming up, even frozen solid water in a somewhat insulated bottle will be completely thawed after 30 minutes with air flowing past it at normal road bike speeds.

Insulated bottles just mean less water in the same space. So for me riding two and three hours at a time, volume of water I can carry is more important than temperature of the drink. I've had some good hydro flasks and other glass thermoses that keep stuff cool or hot for a day, but none that I'd want to carry with me cycling. Mostly because of the extra weight and more volume taken up.

I have a Bontrager and like it ok; however, I have a different take on summer riding and water.

I live in a hot and humid State where summer rides get to 100 degrees and 98% humidity. I perspire so much that I have to take in a lot of water to keep from crapping out. Drinking that much cold water quickly enough to keep hydrated is not easy to do for me. I let the bottle get warm. Not great to drink but that warm water doesn't cramp me up like cold water.

I also used to live in Arizona where a cool summer ride was 105 and a hot one was 117+. It was 130 degrees on the pavement. Same deal. I found that cold or oven cool water made me feel ill and cramp up. I would put two water bottles in the frig to cool them off but my third bottle was room temperature. By the time I got to the cooled ones, they were warm and ready to go.

Unless you're used to drinking a lot of cool or cold water, you may want to experiment first before you dive in for a long first ride with cold water.

Don't fight it. Unless your ride is less than 30 mins, just get used to drinking warm/hot water in the summer.

It's not worth it. Higher weight and more sweating

some of best water I've enjoyed has been acclimated to outside temps.

Insulated bottles that fit into standard bottle cages hold less water! I generally start by filling my uninsulated bottle with ice cubes then fill to top with chilled water (and do this just before leaving on my ride) 😎. To be sure, by the midpoint of my ride, most of the ice has melted but the water is still refreshingly cool. I don’t worry so much about the temp of the water at the end of the ride as it is, for the most part, gone by then. Hydrating early is much more important than at the end. Plus, other than a degree of “cooling effect”, metabolically the body treats water the same regardless of temperature. Whether water is warm or cool, within a very short period of time it equilibrates to body temp!

Why not put your drinks into an insulated bag or container of some sort? If you have a rack, carry them on the rack.

once it goes warm or hot, could always find someone with an attitude. Ask them, "may I have some of your cold? Just a lil bit of it from your shoulder"

I typically ffreeze mine to about the 1/3 mark on one bottle and 2/3rd on the second, they wlll stay cold for about 2 hours, I say 2 hours as my hydration is a bottle and hour. I use both camelbak and Polar and both are the same for me in NE Florida.

Less water than what?

I’d say a 25 Oz. Podium Chill that fits in a standard cage is a good amount.

Thanks, folks!

Picked up the CamelBak. (Will freeze the night before.)

Picked up some tea bags for when the water inevitably turns hot.

Plenty of convenience stores around here. (Duh, kinda slipped my mind.)

And the rusty garden hose, if I can still find someone using one. This might be my favorite.

Oh the days of yore...

Camelbak Podium Ice bottles are my go to. Don't freeze bottles full if you must freeze them. I generally will fill them up a bit put them in the fridge and then add ice to the top before my ride if I want exceptionally cold water though most of the time just the cold water will stay pretty cold for a while in the Podium Ice bottles I don't use other bottles (aside from the regular Podium Chill bottles mostly in winter)

FWIW, 16°C water may be the most effective for exercise, both in the lowered sweat response and in inducing us to drink more.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762624/

More importantly it confirms my personal bias against ice in any of my drinks, particularly water.

Less water than an uninsulated bottle with similar external dimensions 😎.

Example? And what difference do the external dimensions make if they both fit in standard cages?

I'd go with drinking warm liquids, notice I say liquids, not water. Maybe experiment what liquid you find acceptable when it is worm, some taste better than others.

I also don't think that cold drink is good for the organism (as pointed out above) and I am not a health freak who worries about that sort of thing, just a common sense.

I remember my grandma telling about a guy (in the old days, when she was young) who came home from working out in the fields in hot weather, laying down on tiled floor to cool himself off (no A/C in those days ) and catching some illness because of that (maybe pneumonia?) and dying from that some time later. Cold drink is a sort of similar shock to the body too.

some good thermal containers use a double wall construction. The inside dia would have less capacity with a double wall, if both containers have the same O.D. & height.

That explains all the people dying at health clubs after jumping into the cold plunge, or all the Swedes and Norwegians that drop dead when they roll in snow following their sauna. I'm guessing Ben and Jerry have killed a lot of people also.

Unresponsive.

How much less capacity do my insulated bottles have than which bottles fit in standard cages?