Pure glass, safe for health: how to choose safe 'anti-freeze' and spot a toxic counterfeit
Price as an indicator: A suspiciously cheap fluid, especially during severe frost, should raise concerns. Since safe isopropyl alcohol is much more expensive than methanol, a high-quality product cannot be sold at a drastically low price.
Examine the label: Quality products always have a clear, legible label. This label must include: the full product name