Vacuum flask with a rectified has been kind of heat preservation, spent the night is still pretty hot water, but I don't know why not insulation in recent days, hot water for an hour or two becomes cool, depressed!
Should be flat, or doesn't look the insulation thoroughly how suddenly
Estimation is vacuum flask quality is bad, where the gas leak, can change a, the price will not high.
Vacuum flask with a rectified has been kind of heat preservation, spent the night is still pretty hot water, but I don't know why not insulation in recent days, hot water for an hour or two becomes cool, depressed!
