Hydro Flask · Water Bottles & Hydration · Worth packing
Hydro Flask 24 oz Wide Mouth Bottle with Flex Straw Cap
A 24 oz insulated bottle with a straw for long city days
A 24 oz wide-mouth stainless bottle with TempShield double-wall insulation that keeps drinks cold for up to 24 hours, and a leakproof Flex Straw Cap with carry handle. Fits most car cupholders; dishwasher safe.
Our take
Buy a bottle that's too small and you spend the afternoon hunting for refills. 24 oz is the sweet spot for a city day. Enough water to get you to dinner, not so much that it drags down your daypack.
This one keeps water cold for up to 24 hours with double-wall insulation, the straw cap flips open with one hand while you walk, and the slim body fits most car cupholders. It's widely reviewed. The catches are the straw, which means more parts to clean in a hotel sink, and the weight, at over a pound empty. Empty it before security.
If you count ounces, get a plastic bottle. For road trips and city breaks, this is the one we'd buy. Check the price before your trip.
Who it’s for
Road trippers and city walkers who want cold water all day and easy sipping on the move.
Skip it if
Skip it if you count every ounce or hate cleaning straws. A light plastic bottle with a screw cap is simpler.
Hydro Flask 24 oz Wide Mouth Bottle with Flex Straw Cap: questions people ask
Can you bring an empty water bottle through airport security?
Yes. Empty bottles are allowed through US security, so fill up at a fountain on the other side.
How long does an insulated bottle keep water cold?
Hydro Flask rates this bottle at up to 24 hours cold. Start with ice water and it lasts longer.
How do you clean a straw lid while traveling?
Rinse it with hot soapy water at the end of each day and push water through the straw. A small straw brush makes it a lot easier.
Where we recommend it
The Best Travel Water BottlesThe biggest bottle isn't the best one. Size matters most: big enough that you're not hunting for refills, smalWhat to Pack for TokyoIt's easy to pack Tokyo for the temperature and forget the humidity, which is what makes August, with its 34°CWhat to Pack for SeoulSeoul isn't a mild city with the odd cold snap. January lows average -7°C, and summer brings 30–31°C highs witWhat to Pack for BangkokBangkok is hot every single month, with highs of 31°C or more, and the temples still want your shoulders and kWhat to Pack for HanoiIt's easy to assume Hanoi is hot all year and pack only T-shirts. December to February brings highs of 22–23°CWhat to Pack for BarcelonaThe classic Barcelona mistake is packing beach clothes for the city. Highs go from 15°C in January to 30°C in What to Pack for SevilleMost people pack for Seville like it's a beach town. It isn't. It's an inland city that hits 38°C in August, wWhat to Pack for BucharestPeople pack for Bucharest like it's a mild European capital. It swings hard. January lows average -1°C, then JWhat to Pack for NashvilleEveryone packs cowboy boots for Nashville. Fine, but most people get the weather wrong. May and July each brinWhat to Pack for Tel AvivTel Aviv is a beach city, so people pack only beach clothes. That works on the promenade, but not on the day tWhat to Pack for BudapestMost people pack for Budapest like it's a sightseeing city and forget it's a bathing city. Széchenyi and RudasWhat to Pack for DubaiEveryone packs for Dubai's heat and then shivers in it. Outside can be 43°C, but the malls, the metro and everWhat to Pack for ChicagoPeople check Chicago's temperature and miss the lake. Wind off Lake Michigan cuts through the Loop and along tWhat to Pack for Chiang MaiMost people pack for Chiang Mai like it's a Thai beach town. It isn't. The cool season mornings get down to 16What to Pack for TaipeiMost people pack for Taipei's heat and forget the cold. Summer highs hit 33°C with rain on 20 or more days, buWhat to Pack for FlorenceFlorence is small enough to walk end to end, so people pack for sightseeing and forget about the stone. The stWhat to Pack for Washington DCWashington looks compact on the map. Then you walk the National Mall, where the Lincoln Memorial to the CapitoWhat to Pack for Rio de JaneiroRio's summer runs December to February, and it's hot, humid and wet, with 17 rain days in January. People packWhat to Pack for Ho Chi Minh CityPeople pack for Ho Chi Minh City's heat and forget the rain. From May to October it rains on 26 to 30 days a mWhat to Pack for LuxorPeople hear Luxor is hot and pack shorts and tank tops. It is hot, with 43°C highs in July and August, but looWhat to Pack for SeattleSeattle's rain is rarely heavy. It's frequent, with 19 rain days in December and grey drizzle most of the wintWhat to Pack for CharlestonCharleston's summer heat gets the attention, but the humidity and afternoon storms are what wreck plans. July What to Pack for PalmaPalma in July and August is hotter than people expect, with 32°C highs and 23°C nights, and the old town's stoWhat to Pack for ZanzibarZanzibar looks like a pure beach trip, so people pack swimsuits and not much else. Then they get to Stone TownWhat to Pack for Kuala LumpurKuala Lumpur doesn't really have a dry month. Every month averages 16 or more rain days and highs of 30°C to 3What to Pack for Amalfi CoastThe Amalfi Coast punishes heavy luggage. Positano, Ravello and Amalfi are built into cliffs, so your hotel is What to Pack for SantiagoSantiago's dry air means big swings between day and night. A January afternoon hits 31°C and the night drops tWhat to Pack for Foz do IguaçuAt Iguaçu you get wet whether it rains or not. The spray at the Devil's Throat and the boat rides under the faWhat to Pack for SantoriniSantorini's problem is stairs, not weather. Fira and Oia are built down the caldera cliff, so a lot of hotels What to Pack for SingaporeMost people pack for Singapore's heat and forget about the inside. You'll walk out of 31°C humidity into mallsWhat to Pack for Buenos AiresMost people pack for Buenos Aires like it's a tropical city. It isn't. Summer hits 29°C, but June and July nigWhat to Pack for Hong KongHong Kong's heat is only half the problem. From May to October you'll walk out of humid 27°C to 30°C streets iWhat to Pack for New OrleansPeople pack for the New Orleans heat and forget the rain. Summer highs hit 32°C to 34°C, and May to July bringWhat to Pack for AthensMost people pack for Athens like it's a beach holiday. It's a city of hills and polished marble, and the pathsWhat to Pack for DelhiPeople pack for Delhi's heat and forget the rest. The city swings from 39°C in May to monsoon downpours in JulWhat to Pack for CartagenaMost people pack for Cartagena's heat and forget the humidity and the rain. Highs barely move from 30°C to 33°What to Pack for Siem ReapMost people pack for Siem Reap like it's a beach holiday, then get stopped at the temple steps. The upper leveWhat to Pack for CancunMost people pack for Cancun like it's the dry Caribbean of the brochures. From June to October it rains on 20 What to Pack for CairoMost people pack for Cairo's heat and forget its winter. From December to February nights drop to 10–12°C, andWhat to Pack for JaipurMost people pack for Jaipur as if it's hot all year. In January nights drop to 8°C, so a sunrise trip up to AmWhat to Pack for CórdobaPeople pack for Córdoba like it's any other Spanish city. It isn't. In July and August the average high is 38°What to Pack for SavannahEveryone warns you about Savannah's heat. The bigger problem is the bugs. Summer brings 17 to 22 rain days a mWhat to Pack for AvignonProvence sounds warm, so people pack for sun. In Avignon the thing that catches you out is the mistral, a coldWhat to Pack for Da NangMost people book Da Nang as a beach trip and pack like it's dry all year. It isn't. October gets 29 rain days,What to Pack for HoustonEveryone warns you about Houston's heat. Nobody warns you about the air conditioning. You'll spend a lot of yoWhat to Pack for BayeuxMost people come to Bayeux for the Tapestry and the D-Day beaches, and pack for a quiet French town. The town'What to Pack for SorrentoSorrento is a base, not a beach town. Most days you're on a ferry to Capri, a bus along the Amalfi Coast road What to Pack for Wadi RumPeople pack for desert heat and get caught out by the desert cold. In Wadi Rum the days can be warm while the What to Pack for NiceMost people pack flip-flops for Nice and then limp across the beach. It's pebbles, not sand, and the big roundWhat to Pack for BordeauxPeople picture Bordeaux as sunny wine country and leave the rain jacket at home. It rains on 10 or more days iWhat to Pack for Abu DhabiMost people pack for Abu Dhabi's heat and forget the cold. From May to September highs run 37–42°C outside, buWhat to Pack for CannesPeople pack for Cannes as if every day is the film festival. Most of the year it's a relaxed beach town, and tWhat to Pack for LyonLyon looks flat on the map. It isn't. Fourvière and Croix-Rousse are steep hills full of staircases, and VieuxWhat to Pack for AgraMost people plan Agra around the Taj Mahal and pack for the heat. That's only half right. From December to FebWhat to Pack for Loire ValleyPeople pack for the Loire Valley like it's the south of France. It isn't. Even in May there are 14 rain days, What to Pack for PenangPenang's drier months aren't very dry. Every month in our data has at least 17 rain days and highs of 30–32°C,What to Pack for CapriMost people visit Capri on a day trip from Naples or Sorrento and pack like they're going to a beach. The islaWhat to Pack for GranadaMost people pack for Granada like it's the Costa del Sol. It isn't. The city sits high up at the foot of the SWhat to Pack for PhiladelphiaPeople think of Philadelphia as a mild East Coast city. It swings hard. July hits 32°C with 14 rain days, and What to Pack for San DiegoPeople pack shorts and nothing else for San Diego. Then the sun goes down. Highs only move between 17°C and 25What to Pack for Xi'anMost people plan Xi'an around the Terracotta Warriors and forget how far the weather swings. Winter lows drop What to Pack for PhuketMost people pack for Phuket like the brochure says: sunny, dry, beach. The weather data says otherwise. Even tWhat to Pack for Aix-en-ProvencePeople pack for Provence as if it's always summer. Aix gets real winters, with lows of 2–3°C from December to What to Pack for PisaMost people treat Pisa as a quick stop for a tower photo and pack for sunny Italy. Pisa gets rain on 12 to 15 What to Pack for MaltaMalta's summers are hot, dry and bright, and the islands are built from pale limestone that reflects the sun aWhat to Pack for DubrovnikDubrovnik's problem is underfoot. The Old Town's limestone streets are polished smooth and the City Walls are What to Pack for KotorKotor is all stone steps. The climb to the fortress is steep, and the old town's polished limestone streets geWhat to Pack for MykonosMykonos's packing problem is the wind. The meltemi blows hard in July and August, so hats fly, sand stings andWhat to Pack for San JuanSan Juan is warm and showery all year, so the weather is easy to dress for. The packing problem is the ground:What to Pack for DohaDoha has two packing problems at once. Outside, summer highs reach 43°C, and inside, malls and hotels run theiWhat to Pack for JerusalemJerusalem's packing problem is the dress code. The holiest sites expect covered shoulders and knees, while sumWhat to Pack for NassauNassau's winters are milder than people expect, and its summers are hot and stormy. The packing problem is theWhat to Pack for TulumTulum is hot and humid, and you will be in the water a lot. The packing problem is the cenotes: many require yWhat to Pack for HiroshimaHiroshima's summers are hot and sticky, with the tsuyu rainy season in June and July. You will also take your What to Pack for Costa RicaCosta Rica packs several climates into one trip. These numbers are from San José airport in the Central ValleyWhat to Pack for MedellínMedellín is the City of Eternal Spring. At about 1,500 m, highs stay at 27–29°C and lows at 15–16°C every montWhat to Pack for HonoluluHonolulu is warm and mostly dry, with highs of 27–32°C all year. The packing problem is the reef: Hawaii bans What to Pack for TenerifeTenerife packs two climates into one trip. The south coast is sunny and almost rainless, but the summit of MouWhat to Pack for ValenciaValencia is flat, sunny and built for bikes. The packing problem is August heat at 32°C and the noise and crowWhat to Pack for MálagaMálaga gives you two trips in one bag. Costa del Sol beaches need sun gear for 33°C summers, and the Caminito What to Pack for Victoria FallsAt Victoria Falls, the weather is not what gets you wet. From about February to June the spray from the falls What to Pack for OaxacaOaxaca sits at about 1,550 m, so the sun is strong and the nights are cool. A single day can swing from a 10°CWhat to Pack for KrugerKruger's packing problem is the gap between dawn and noon. In winter, open game drive vehicles leave camp nearWhat to Pack for MumbaiMumbai is hot all year, and from June to September the monsoon dumps rain almost daily. You pack for heat and Packing list: Packing List for Hot and Humid WeatherIn humid places clothes dry slowly, so pack for that, not just the heat. Linen over technical fabric, one morePacking list: Family Trip Packing ListWith kids, anything you need on the way goes in the day bag, not the suitcase. One cube set for the whole case
More in Water Bottles & Hydration
Nalgene · Water Bottles & Hydration
Nalgene 32 oz Wide Mouth Bottle
A tough, light quart for hikes and road trips that pairs with many water filters, but it isn't insulated and the wide mouth splashes on the move.
Hydro Flask · Water Bottles & Hydration
Hydro Flask 18 oz Standard Mouth Bottle with Flex Cap
Small enough for a side pocket on city days, but you'll refill a lot in the heat, so hikers should go bigger.
Nalgene · Water Bottles & Hydration
Nalgene 32 oz Narrow Mouth Bottle (Amethyst)
Spills less than the wide-mouth version when you drink on the move, but many water filters won't fit and ice goes in slowly.
Prices change often — the price on the retailer’s page is the one you pay.