The Ocean Bottle 350 ml travel mug has double wall insulation to keep drinks hot for up to four hours and cold for up to ten hours. The ergonomic handle allows you to attach it to bags or other items to optimise storage space and carrying capacity. Each travel mug is entirely carbon neutral and collects 1,000 plastic bottles to improve livelihoods in coastal communities. The mug is made from 90% recycled stainless steel and other recycled materials. Presented in a responsibly sourced recycled cardboard gift box.