Product photograph.A CLOSER LOOKDrinkware
Flip the spout. Keep the bottle upright.
Hydro Flask Wide Mouth Flex Straw Cap
Black Flex Straw Cap; two trim-to-fit straws
Buyer feedback ↓An alternate lid for Hydro Flask Wide Mouth bottles, with a flexible carrying strap and a straw that you trim to your bottle.
- Wide MouthBottle fitHydro Flask family only
- Two strawsIncludedTrim to your bottle
- Cold drinksIntended useNot a hot-drink lid
Amazon US · Black Flex Straw Cap; two trim-to-fit straws · Retailer link
THE QUICK TAKE
Is it right for you?
Choose this if you want upright sips without unscrewing a cap. The flip-up spout changes how you drink from a compatible bottle, and the flexible strap gives your hand room to carry it.
Keep a simple Flex Cap if easy cleaning or hot drinks are the priority. This lid adds a straw, moving spout and removable seal to wash. It does not fit every bottle just because the opening looks wide.
01 / BUYING NOTES
Before you buy.
Maker specifications ↗ · Cap cleaning instructions ↗ · Exact package ↗
02 / AMAZON REVIEWS
The buyers’ view.
Owners of the black Flex Straw Cap describe easy cleaning, with one specifically praising access to the removable red seal. That owner wishes the drinking surface had a cover. A buyer discussing both the new Wide Mouth and Standard Mouth straw lids likes the carrying handle but reports substantial spilling when the spout is left open.
What buyers like
- quality347
- functionality165
- fit157
- ease of cleaning80
- replacement70
Mixed feedback
- sealing119
- Durability87
- straw size84
The small numbers are review mentions. Topics and sentiment are from Amazon’s customer-review overview.
Amazon US · Checked . Ratings may include other colors and sizes.
View source ↗03 / REVIEWS & VIDEO
See it in use.
See how it works, then read the findings behind the buying advice.
What is the Best Hydro Flask Lid? (Including 2 Many People Don't Know About)
The Flex Straw Cap discussion starts at 3:22. The video also covers other Hydro Flask lids, so check the named cap before transferring a feature.
Watch on YouTube ↗Video and written sources are labeled by creator and tested scope. Manufacturer demonstrations explain use; they are not independent tests. No in-house hands-on testing is claimed.
Read 2 written sources Product scope is labeled · key findings in bold
The cap is designed for cold-drink sipping and closes over the straw spout. A flexible strap provides a carrying loop; compatibility remains specific to Hydro Flask Wide Mouth bottles.
Cleaning includes removing the straw and the red seal, washing the components, and reinstalling the seal correctly. That extra access is useful, but it adds parts to the cleaning routine.
04 / COMPARE
Different priorities.
Choose the tradeoff that fits how you will use it.
Swipe to see every alternative →
THIS GUIDEHydro Flask Wide Mouth Flex Straw CapBlack Flex Straw Cap; two trim-to-fit straws |  ALTERNATIVEHydro Flask Wide Mouth Flex CapBlack · screw-off cap | |
|---|---|---|
| Amazon price | $14.95 | $14.90 |
| Best for | Upright cold-water sipping | A simple closed bottle |
| Design | Flip-up spout and internal straw | Screw-off insulated cap |
| Care / use | Remove straw and seal to wash | Fewer drinking components |
| Consider | Cold drinks only; straw trimming | Remove the cap for each drink |
| Explore | Read buying guide →Amazon source ↗ | Read buying guide →Amazon source ↗ |
About these everyday comparisons
Approximate comparisons to familiar objects: a bank card’s 3.37-inch long edge, a Letter sheet’s 11-inch long edge, or a US nickel’s 21.21 mm diameter / 5 g weight. Water comparisons exclude the container’s weight. Capacity comparisons describe volume, not exterior size or how food fits. Reference pictures identify the object; use the labeled ratio for the comparison.
05 / PRICE HISTORY
The price over time.
Hydro Flask Wide Mouth Flex Straw Cap · Black Flex Straw Cap; two trim-to-fit straws · Amazon US
This chart tracks Amazon’s selling price. Marketplace sellers, coupons and size/color selections can have different prices. Blank periods are missing observations, not a zero price.
06 / RELATED FINDS
A useful extra.
For the way you plan to use it.
Get inside the straw and lid.
Hydro Flask Straw Cleaning Set
The long brush reaches the drinking straw, and the small detail brush works around the cap’s tighter spaces.