Stainless steel construction trades the squeeze-bottle simplicity of plastic for thermal performance that keeps water cold for eighteen hours. The double-wall vacuum insulation creates an air gap that prevents heat transfer from outside temperatures, which means water stays cold from the start of a long ride through to the finish even when you're riding in summer heat. At 354 grams, it weighs more than a plastic bottle but less than you'd expect from an insulated metal bottle with this capacity. If you've been carrying two plastic bottles to ensure cold water on longer rides, a single insulated bottle might actually save weight while delivering consistent temperature.

The high-flow cap opens with a simple flip rather than requiring squeeze pressure to pull water through a valve. You tip the bottle, open the cap, and drink—no hand strength needed to compress rigid metal walls. A vent tube inside the bottle allows air to enter as water flows out, which prevents the vacuum effect that would otherwise slow flow rate when you're trying to drink quickly. The leakproof lockout mechanism seals the cap completely shut for transport so you can toss the bottle in a bag without checking twice whether it's going to leak all over your spare kit.

CamelBak builds the bottle from 18/8 stainless steel, which resists corrosion and doesn't retain flavors or odors from previous fills. If you've dealt with metal bottles that make water taste metallic or hold onto the flavor of yesterday's electrolyte mix, this is what stainless grade matters for. The optimized diameter fits standard bottle cages without modification or force. The bottle will develop scratches and wear marks from cage contact over time—that's normal for metal bottles bouncing in cages on rough roads and doesn't compromise the insulation or structural integrity of the vacuum seal. All components separate for cleaning. The twenty-two-ounce capacity handles rides where you need more than a standard bottle provides but don't want to carry multiple bottles or stop for frequent refills.