Milton Thermosteel Slender Flask 750ml RedMilton Insulated Steel Bottles are a part of the Thermosteel Range. Its unique temperature retention mechanism keeps your beverages hot or for 24 hours. This bottle is extremely slim and compact and would fit easily into the side pockets of your bags.Milton Thermosteel Slender Flask 500ml RedMilton Insulated Steel Bottles Are A Part Of The Thermosteel Range. Its Unique Temperature Retention Mechanism Keeps Your Beverages Hot Or For 24 Hours. This Bottle Is Extremely Slim And Compact And Would Fit Easily Into The Side Pockets Of Your Bags.