Hydro Flask Standard Mouth Flex Cap
Best leak-proof upgrade for active travelers using standard mouth bottles.
This cap turns your existing bottle into a truly grab-and-go essential. The flexible strap and leak-proof seal make it rugged enough for any trail, though you do sacrifice the streamlined look of a standard lid for the added utility of a carry handle.
$12.50
Who it's for
- Commuters needing an easy-to-carry bottle on the go
- Outdoor adventurers requiring gear that survives rough handling
- Bag packers worried about accidental spills and leaks
Who should skip it
- Users who prefer low-maintenance, easy-to-scrub hydration gear
- Budget-conscious shoppers looking for affordable replacement parts
- Drinkers prioritizing maximum temperature retention for their beverages
Performance breakdown
Thermal Retention
Honeycomb insulation maintains temperature integrity for extended outdoor excursions.
Leak Resistance
Precision engineering ensures a reliable seal for worry-free transport in bags.
Portability
Flexible strap and pivot design make carrying effortless on any trail.
Maintenance Ease
Dishwasher-safe construction simplifies cleanup after daily use.
Compatibility
Seamlessly fits the entire range of standard mouth bottle sizes.
Durability
Robust materials and a lifetime warranty guarantee long-term field reliability.
Key Specs
Material
Stainless Steel and Plastic (Polypropylene PP#5)
Closure Type
Screw On
Compatibility
All Standard Mouth bottles
Weight
0.05 Pounds
Item Dimensions (L x W x H)
2.85 x 2.85 x 10.3 inches
BPA-Free
Yes
Warranty
Lifetime Warranty
Spill Proof
Yes
Dishwasher Safe
Yes
Beverage Type Compatibility
Hot Beverages, Cold Beverages
Know before you buy
Still have a question?
Ask Metto anything about the Hydro Flask Standard Mouth Flex Cap before you decide.