ventilated back system

Waterproof main compartment with internally sealed seams

Eco-certified: made with bluesign® approved materials

Designed to withstand extreme conditions

Effective against bacteria: Yes

40 oz wide mouth black 2026 Colour:Black ventilated back systemDouble insulated stainless steel, to banish lukewarm drinks forever Carrying just over a litre of liquid, this 40 oz insulated bottle from Hydro Flask is ideal for full day adventures into the wild. Using a unique double wall vacuum insulation, the bottle can keep drinks either hot or cold for hours on end. The wide mouth design makes filling and cleaning easy. Its large enough to drop ice cubes into the flask too. A new powder coated process is also