Vacusteel Flask Keeps beverages Hot/cold for 24 hours Thermoseal technology 304 quality steel 100% vacuum insulated stainless steel body BPA free Perfect for hot and cold beverages Inside copper coating for better heat retention Easy sip mouth Fill the flask completely to maintain temperature Do not use flask for carbonated drinks Ideal for hot and cold beverages Stainless steel double wall mugs with comfortable grip handle Easy to clean and corrosion resistant Ideal for daily use in home, office, workplace, canteen, shop, etc.