The ml Evergreener 350ml Stainless Steel Ml Brew Flask brew flask is a great choice for hot drinks on the go. The bottle contains recycled stainless steel and recycled ocean bound plastic. One brew flask collects 1, 000 plastic bottles and improves livelihoods in coastal communities. The flask is NFC Smart Chip enabled to collect more plastic with every refill. The innovative 360 lid lets aromas circulate, and the double thermal insulation from recycled stainless steel keeps drinks hot for up to six hours. Presented in a responsibly sourced recycled cardboard gift box.