Boasting stainless steel vacuum insulation, this double walled Classic 1.9L vacuum flask from Stanley is perfect for keeping hot drinks hot and cold drinks cold for up to 45 hours (08 days for ice). Constructed from 18/8 stainless steel that's naturally BPA-free, this stylish green flask is leak-proof and rust-proof, making it a durable option that won't disappoint. Other features include a cap that can also be used as a cup and a generous lifetime warranty.