It doesn’t leave wet patches. If you used the bottle without the cover, it would. But the cover makes it so that heat energy only slowly leaches into it. In other words, the surface of the covered bottle is probably around 60F/16C. And the surface is fluffy, not smooth.
It doesn’t leave wet patches. If you used the bottle without the cover, it would. But the cover makes it so that heat energy only slowly leaches into it. In other words, the surface of the covered bottle is probably around 60F/16C. And the surface is fluffy, not smooth.