The 20 pack of 20 linkyo colored liquid chalk markers are just like the 10 pack. The Linkyo Liquid Colored Chalk Markers work amazing. I would use these every time for special events like birthdays, weddings, graduation, holidays, and so on. The set up is so easy that you can start you creative acts in just minutes. All you have to do is shake and pump until you see the color come out. The colors are vibrant and amazing. Its fun for all sizes and easy to start and stop right away. The only issue I had with the 20 pack was the same as the 10 pack. The lids are hard to put back on to the marker so it wouldn’t dry up. Before using make sure you test what you will be drawling on in a small spot in the corner to make sure it can be taken off. I had no issue with these coming off of anything I used it on.