The Rubyflask is a 32 oz insulated water bottle designed for multi-purpose use in the gym, office, or while camping. It is constructed from 18/8 (304) food-grade stainless steel with a standard wall thickness of 0.5mm. The double-wall vacuum insulation is designed to help maintain the temperature of both hot and cold beverages for several hours. The exterior is finished with an electrostatic polyester-based powder coating, providing a secure, high-friction grip even in humid environments.
This model comes with three different lids, including a straw lid for quick access. The wide-mouth opening (2.2 inches) makes it easy to fill with ice or connect to certain water filtration systems. Note that the 3.5-inch base diameter is larger than most standard automotive cup holders, so the bottle is best suited for desks, gym floors, or backpacks with large side pockets.
- Includes multiple lid options to adapt the bottle for different drinking styles and activities.
- The powder coat finish helps the bottle stay dry on the outside, preventing condensation rings on surfaces.
- Standard 18/8 steel ensures the vessel is resistant to corrosion and does not leach flavors.
To maintain a reliable seal, it is helpful to check the silicone O-ring after washing to ensure it is properly seated. Hand washing is the best way to preserve the powder coating and the mechanical components of the straw lid. If you live in a region with hard water, periodic cleaning with a soft brush will help prevent mineral buildup along the internal weld seams.
For those who need an even larger capacity for long hikes, the Iron °Flask 40 oz Hydration Flask offers a similar modular lid system.
You can find helpful ways to organize multiple large bottles by visiting our stackable water bottle racks category.
