1 / 6Hydro Flask Wide Flex Cap 40 oz Stainless Steel Bottle
The Hydro Flask Wide Flex Cap is a 40 oz stainless steel water bottle with double-wall vacuum insulation and a flexible-handle cap. The listing claims cold drinks stay cold for up to 24 hours and hot drinks stay hot for up to 12 hours, with the cap leakproof when closed. At this capacity, it suits buyers who want fewer refills but may be bulky for smaller bags.
At a glance
- Listing claims double-wall vacuum insulation keeps drinks cold for up to 24 hours or hot for up to 12 hours.
- Flex Cap is described as leakproof when closed and has a flexible handle for carrying.
- Wide-mouth opening is described as fitting ice cubes.
- Manufacturer says bottle and lid are dishwasher safe.
Reference price: $59.95
Price checked: Nov 13, 2026
View offerAhead of Black FridayExplore the selectionOften bought together
Pros and cons
Pros
- The stated 40 oz size offers substantial capacity between refills.
- A flexible cap handle and wide mouth support carrying and adding ice.
- Dishwasher-safe care is stated for both bottle and lid.
Technical specifications
11 specifications| Brand | Hydro Flask |
|---|---|
| Model | Wide Flex Cap |
| Colour | Mermaid Green |
| Recommended use | Water |
| Age range | Adult |
| Capacity listed | 1.13 kg |
|---|---|
| Dimensions (W × H) | 9W x 32.3H centimetres |
| Weight listed | 0.59 kg |
| Material listed | Stainless Steel |
|---|---|
| Insulation feature | Double Wall |
| Care instructions | Dishwasher Safe |
What to know before buying
Listing details to confirm
The listing labels capacity as "1.13 kg" while the title and feature copy call it 40 oz. These units describe different quantities, so the capacity field is inconsistent. Confirm the intended capacity before buying. Temperature-retention times are manufacturer claims, not independently verified. Use only as directed. The manufacturer says not to use it on a stove, in a microwave or freezer, and to keep hot drinks out of children's reach.
What’s in the box
Included- Water bottle
Who is it for?
A good fit for
- Adults wanting a large reusable bottle for water and fewer refills.
- Buyers who value a wide opening for adding ice and dishwasher-safe care.
- People who want a handled cap and claim of temperature retention for both cold and hot drinks.
Less suited to
- Buyers prioritizing a small, lightweight bottle for compact bags.
- Anyone who needs verified capacity in volume units without resolving the listing's inconsistent capacity entry.
Customer reviews on Amazon
- 5 stars
77% 77% - 4 stars
9% 9% - 3 stars
7% 7% - 2 stars
2% 2% - 1 star
5% 5%
Customer feedback is generally favourable about quality, cold-water retention, colour and appearance, with some also liking the size. Reports are not uniformly positive: rusting around the lip and quick staining are mentioned, while durability and leakage experiences vary. Those concerns matter for a bottle advertised as stainless steel and leakproof when closed, so the listing claims should not be taken as assurance against the reported issues.
Positive themes
- Customers describe good quality and say water stays cold for a long time.
- Colour and appearance receive positive mentions.
Negative themes
- Some customers report rusting around the lip and staining quickly.
Mixed feedback
- Customers report varied experiences with durability and leakage.
Frequently asked questions
How much does this bottle hold?
The title and feature copy describe a 40 oz bottle, but the technical capacity field says "1.13 kg," a mass unit. The listing is inconsistent, so confirm the capacity with the selected listing before purchase.
How long does it keep drinks hot or cold?
The manufacturer claims up to 24 hours cold and up to 12 hours hot using double-wall vacuum insulation. These are stated claims, not independently verified performance.
Is the cap leakproof?
The listing says the Flex Cap is leakproof when closed. It does not make that claim for an open or incompletely closed cap.
Can the bottle go in a dishwasher?
The manufacturer says both the bottle and lid are dishwasher safe. It also says not to use the bottle on a stove, in a microwave or freezer.
Alternative options
Owala FreeSip Insulated Stainless Steel Water Bottle with Straw, BPA-Free Sports Water Bottle, Great for Travel, 24 Oz, Lilac You A lot
$41.99
HydroJug Sport 40 oz Insulated Stainless Steel Water Bottle, Pink Sand | Triple wall insulated, circular flip straw, leak-resistant, swivel handle, removable rubber boot, BPA-free, dishwasher safe
HydroJug Ease2o 40oz Insulated Water Bottle, Straw & Chug Lid, Cascade | Pressure-vented lid, leak-resistant, stainless steel, vacuum insulated, water-level window, cup holder friendly, BPA-free
$62.99
Straw Lid Compatible with Hydro Flask Water Bottle Standard Mouth - Flex Handle Straw Lid Top Cap Replacement 12 oz 18 oz 21 oz 24 oz
$18.99
Owala FreeSip Sway Insulated Stainless Steel Water Bottle with Two-Way Spout, Built-In Straw and Bucket Handle, Made for Travel, School, and Sports, 30oz, BPA Free, Leak Proof, Black Cherry
$41.82
LARQ Twist Top Leak-Proof Reusable Insulated Stainless Steel Water Bottle | 24h cold or 12h hot, spill proof and no sweat. Dishwasher safe metal water bottle for gym, travel, running. 25 oz, S. Mint
$48.95
LARQ Swig Top Insulated Stainless Steel Water Bottle with Straw and Handle | Wide mouth, cold 24 hours, BPA free metal water bottles for men and women, for gym, travel, office, sport. 34 oz, G. White
$64.95
WixByti One Gallon Insulated Water Bottle, Stainless Steel 128oz Water Jug | (Cold 48 Hrs), Triple Wall Vacuum, Leak-proof & Non-BPA, Large Sports Water Bottle with Straw Spout Lids & Paracord Handle
$53.99
HydroJug Traveler 40oz, Insulated Water Bottle with Handle, Olive | Triple wall insulated, flip straw lid, leak-resistant, stainless steel, cup holder friendly, BPA-free, dishwasher safe
RAYMYLO One Gallon Water Bottle Insulated 128 oz, Stainless Steel | Triple Walled Vacuum (Cold for 48 Hrs), Leak Proof & Non-BPA, Large Water Flask Jug with Paracord Handle & Straw Spout Lids
$57.99
AVA DESIGNZ CLEO HOME 100% Pure Copper Water Bottle for Drinking, 32 Oz Large Hammered Ayurvedic Copper Bottle with 2 Pockets Canvas Bag & Cleaning Brush, Leak-Proof Copper Water Bottle
$63.99
HydroJug Traveler 40oz, Insulated Water Bottle with Handle, Canyon Rose | Triple wall insulated, flip straw lid, leak-resistant, stainless steel, cup holder friendly, BPA-free, dishwasher safe
$62.99
