Instruction: Answer the given question using the supporting document.

Input:
Question: slot to put paper inside; for Zentangle inserts.  Has anyone used them with Zentangle?
Document: These squares were advertised as being good for drawing Zentangle designs, and I was not pleased with the results. The ink from my Micron pens bled into the fibrous cardboard textured squares. I decided to try and put a top coat on them to prevent this from happening. I used Mod Podge and a foam brush and coated several of the coasters. I let them dry, and then tried drawing tangles again... now they work fine.
Zentagle practice pads. I know, no cocktails on these babies, I use them for Zentangle practice. I put them in my purse or drawing kit and take them along to keep my hands busy. Who knew?
Good for what it's meant to be, but bad as a zentangle paper, since it's too rough.The product itself deservses 5 stars, but if it was for its pros as a zentangle paper, I would have given only 1 star.
These are quite functional as Zentangle(r) tiles at a fraction of the cost. I am quite pleased with them, even though the quality of paper is nowhere near the same as the originals. Definltly worth the difference in price
I actually sat down and counted how many were in the box and mine was 5 short! Other than that, decent quality. I'm using them for Zentangle and they're perfect for that purpose. They (so far) are holding up well for paper coasters.
I ran across these plain paper coasters on the internet while reading about the artform of &#34;Zentangle&#34; and decided to order some. Though I haven't had a lot of time to work with these yet, I am imagining the hundreds or thousands of things I might do with them.
I watercolor litle things on them, dont have to stretch the paper and they suuck up the water so quickly that you get interesting effects....Thanks Amazon!
Hmmm. Not only were these an odd gray color the quality of paper is not great. Local office supply or say, liquor store a better choice....
I bought these coasters to put doodling on...didn't work very well until I sprayed them with acrylic spray before using ink on them because they are too porous. I did do a watercolor wash, then spray and seal, then added my doodling on that and resealed it. That turned out well. But I like doing the ink and then using colored pencils.Both sides need to be sealed along with the edges in order to make it reusable.
These can be used for the coaster they are, and they are a nice format for drawing on  - they are what I hoped for
Answer: I got them for zentangle, but I found them too rough to draw on.  I coated them with white gesso, since they were not white, and it help some.  It depends on what you are use to drawing on.  I use Copics, and want a smooth surface. They are tough on the pen tips and will wear down Micron pen before it is empty.