4. If you use the duskin sponge with a cutter knife, you can clean the corners of your lunch box or the items with a divider. It is economical because it will last a long time without denting.The slightly longer size is perfect for cleaning cups. A popular classic Daskin product that has been widely spread just by the review.It has received many support for staining, bubbleing, durability, and that once you use it it it will not be enough for other sponges. The bright colors and comfort make it easy to eat up.