Blue Royal Glass Mate Cup Soulmate Yerba Co. Sale! from $25.00 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. Glass interior, high grade plastic exterior with bright colored design. Holds 6 oz. argentina glass tea cup glass yerba mate glass yerba mate cup looseleaf royal sky blue yerba kit yerba mate Tweet