This unique 540 ml mason jar is completely covered with vacuum-insulated stainless steel including a handle and therefore keeps the drink ice cold for hours! The stainless steel cover also offers additional protection against breakage. The leak-proof metal lid with silicone straw offers protection against insects and prevents easy spillage. Thanks to asobu Moonshine, the days are over when children in particular complain about drinks that are too warm on the terrace in summer. And thanks to the stainless steel insulation, the Moonshine even works the other way around for warm drinks like tea.