Best Grandad Gift: 49% Grandad 51% Badass Insulated Tumbler 20ozPersonalized grandad gift idea: Insulated Tumbler for Grandad BackyardPeaks This 20 oz. tumbler features the funny saying "49% Grandad 51% Badass." It's the perfect way to show your appreciation for the best grandad ever. This durable and unique tumbler will definitely put a smile on his face. Make it a memorable birthday or Christmas present that your grandad will enjoy seeing every time they take some coffee or tea to go! Vacuum insulated for 2X