McVities Original Digestives - 400g from $5.45 Qty. Add to Cart 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. A digestive biscuit, sometimes described as a sweet-meal biscuit, is a semi-sweet biscuit.