Personalized Kawaii Octopus Bubbe's Sweetheart T-Shirt. Looking for a kawaii and octopus-themed design for your Jewish grandma? Look no further than Bubbe's Sweetheart! This design is perfect for grandma's who are the grandchild's sweetheart, and is available on a variety of products. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.