Tesco Double Strength Blackcurrant Squash - 750ml Sale! from $3.50 Click here to be notified by email when Tesco Double Strength Blackcurrant Squash - 750ml becomes available. This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. This product can be aversely affected by temperature fluctuation. Please be aware of this and willing to accept this before ordering.