IVG Concentrate Blue Slush flavoured concentrate is deliciously cool and fruity, with a unique and invigorating cold sensation. Blue Slush makes a beautiful vape for a hot summer’s day. This is a thirst-quenching and delicious combination of blue raspberry flavour topped up with crushed ice. IVG concentrates have been perfectly blended so that you can use them as standalone flavours in DIY e-liquid. You could also try blending them with other fruity flavours.