The HydroKeep Pro is built around the belief that hydration quality should never be an afterthought. The double-wall vacuum chamber is copper-coated internally to maximise thermal reflection — it outperforms single-wall, plastic-lined, and even many premium competitors in standardised temperature-retention benchmarks.

Constructed from food-grade 18/8 (304) stainless steel, it carries zero BPA, BPS, phthalates, or plastic lining. There is no synthetic taste, no leaching under extreme temperatures, and no off-gassing when left in a hot car. The powder-coat exterior holds its colour, texture, and grip for years of outdoor use.

The 68 mm wide mouth accommodates full-size ice cubes and a standard cleaning brush. The lid threads onto a dual-pitch thread with a TPU gasket that is independently tested to 1.5× operating pressure — genuinely leak-proof when tightened. Dishwasher-safe on the top rack (lid only).