A CLOSER LOOKDrinkware
Wide to fill. Small to sip.
humangear capCAP+
capCAP+ · green
Buyer feedback ↓The green capCAP+ replaces a compatible wide-mouth bottle cap with a smaller screw-top drinking opening. Unscrew the whole base when you want the wide opening back.
- 2-in-1Two openingsSmall spout above a wide base
- 63 mmNominal neck standardCheck the maker’s bottle compatibility list
- Top rackDishwasher careCap assembly, not your bottle’s care rating
Amazon US · capCAP+ · green · Retailer link
THE QUICK TAKE
Is it right for you?
This is useful if you like a wide opening for ice and washing, but a smaller one for drinking. Keep your compatible bottle and change the cap. The small cap has a grippy edge, and its tether can hold it away from your face while you drink.
Pass if your bottle is outside humangear’s confirmed compatibility list, or if you want a push-button or straw lid. Both openings screw open, and the tether adds another part that can wear. The capCAP+ also does not fit Klean Kanteen’s wide-mouth insulated bottles.
01 / BUYING NOTES
Before you buy.
A smaller opening above the big one.
Open the green cap for drinking. Unscrew the dark base to fill or clean the whole bottle opening.
Check the bottle, not just the neck.
A similar-looking thread does not prove a seal. Use the confirmed compatibility list; the “+” model supports more bottles than the older capCAP.
Stow the small cap while drinking.
The tether keeps the small cap attached, and the CapKeeper notch holds it back. Avoid repeatedly folding the same point sharply.
humangear cap design and care ↗ · Confirmed bottle compatibility ↗ · Man Makes Fire field review ↗
02 / AMAZON REVIEWS
The buyers’ view.
What buyers like
- quality271
- Leak resistance121
- functionality115
- drinkability64
- Value for money53
- versatility53
Mixed feedback
- Durability158
- sealing86
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.
No more water spilling with the best cap for water bottles
A short look at the two-opening idea and the attached cap. Use humangear’s compatibility list to check your own bottle rather than assuming every wide mouth fits.
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 reviewer liked the smaller drinking opening and sealing design. After repeatedly folding the tether with one finger during daily use, that tether began breaking after about a year.
The Plus version adds support for many wide-mouth stainless-steel bottles. The maker excludes Klean Kanteen wide-mouth insulated bottles and does not promise fit for every similar opening.
04 / COMPARE
Different priorities.
Choose the tradeoff that fits how you will use it.
Swipe to see every alternative →
THIS GUIDEhumangear capCAP+Green |  ALTERNATIVENalgene Easy SipperWhite · wide-mouth insert | |
|---|---|---|
| Amazon price | $13.99 | $6.35 |
| Best for | A small screw-top drinking opening | Reducing flow while retaining a Nalgene cap |
| Design | Replaces the bottle’s whole cap | Press-in insert inside the bottle mouth |
| Care / use | Top-rack dishwasher safe | Remove it for cleaning |
| Consider | Thread compatibility is essential | It is not a sealed replacement lid |
| Explore | Read buying guide →Amazon source ↗ | View on Amazon ↗ |
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.
humangear capCAP+ · capCAP+ · green · Amazon US
The chart legend identifies Amazon and new-offer prices when available. New offers can include marketplace sellers. Coupons, shipping and size/color selections can change the final price. Blank periods are missing observations, not a zero price.
06 / RELATED FINDS
A useful extra.
For the way you plan to use it.
A compatible bottle base
Nalgene Wide Mouth
The standard wide-mouth Nalgene family is on humangear’s compatibility list. Remove its original cap before fitting capCAP+.