http://www.goodlife.com/mangrove/mangrove-stainless-steel-flask-nvfb-1000/185989/product-detail use ocde GLMF351 Mangrove Stainless Steel Flask which Keeps contents Hot/Cold for hours together. It is vacuum insulated flask which helps it to keep liquid hot or cold for hours. Details : Material - Stainless Steel Capacity - 1000 ml