Can I pour boiling hot liquids into the jar of my Philips Blender?

No, you must not pour very hot ingredients into the Philips Blender jar as it may damage the jar and its accessories. 

If you want to pour ingredients, like boiled spinach for pureeing, into the jar, first let the ingredients cool down to a temperature of less than 60°C / 140°F to avoid damaging the appliance.