GOULAF insulated water bottle

An original insulated flask that keeps both hot drinks at temperature for 12 hours and cold drinks for up to 24 hours. The illustration uses a funny Belgian expression Goulaf which means glutton. Its daily use is a good alternative to the use of plastic cups or bottles. It is also practical and economical. To keep a drink hot, first fill the bottle with boiling water. Close and wait 5 minutes before emptying it. Then pour the drink of your choice into the gourd. For a cold drink, proceed in the same way, filling the insulated bottle with ice water. After each use, hand wash the bottle with mild soapy water. Rinse thoroughly. Turn the bottle upside down to dry it. Periodically, clean the bottle with a mixture of sodium bicarbonate and boiling water. Do not put in the dishwasher.