Flexible and reusable: quality black foam insert expands and contracts, which is much steadier, and stable, reusable and easy to clean, you can use it repeatedly for many times Practical to use: the black cup foam inserts are featured with multi-point support design, which keeps the sponge elastic and easier to be put into cup, your cups be not easy to tilt, providing protection Package includes: this package includes 4 pieces of cup turner foam inserts in 2 sizes, 2 pieces for each size, fit for 10 oz, 12 oz, 14 oz, 20 oz, 30 oz, 35 oz and 40 oz normal and skinny tumblers, meeting your different needs Widely applied: cup elastic sponges can be widely applied to electronics, electrical appliances, furniture, automotive industry and more, practical lining for packaging different cups, bottles, tumblers, glass, ceramic and more crafts