Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: how does this do with double dvd movies? is there wasted space?
Document: This is a solid product that works really well. My only complaint is that it only holds 90 DVDs. I would like to see a version that holds double. I had to buy 2 of these.The construction is good, the sleeves are decent(though the stitching can be a little sloppy which causes some tight fitting covers), and it does the job you want it to do.This product has helped me save some space in my house and I would recommend it to anyone.
I purchased 2 of these or get my exercise dvd's in one place and organized. I use to have another system but the dvd paper cover and disc were housed in separate containers. This system has a pocket for the cover and right behind is a pocket for the disc. This way I can flip through the cases and visually see, then chose what I want in one step. The only negative is that the front pocket is a bit snug for some paper covers.
I ordered 6 of these to hold my entire DVD collection (over 500 movies) with room to grow. They hold everything very nicely and I like that the sleeves are material, so no chance of scratching the DVD itself. Very happy with this product and will definitely order more as needed.
If you have a lot of DVD's like I do, this is the item you need to store them and take them with you safetly. I move around a lot due to my work, and needed a item to put my movies in and transport them from post to post. I've tried many other cases and box's, but have found these Slappa cases to be the best.
Answer: There is only one space for the disc in back of the cover space. So you would need to use the next slot over for the extra disc. The disc slots are shorter than the cover slots so you can get the dvd out easily. Conceivably you could put the extra dvd in back of the paper cover but it would be inconventient.