Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Where all places is the gel / freeze material in this box ? It says walls but want to know whether base also has the gel and what about the Lid ?
Document: Great for when I want to take a sandwich along, but don't want to carry the lunch box.
A few things kept me from completely loving this sandwich box... 1) the gel doesn't stay frozen for very long and 2) the condensation can create soggy sandwiches.
I use this item to store cheese slices that I use when training my dog. The cooling effect lasts much longer than those plastic containers that have the thin rectangular container filled with (water? / some other liquid?) that snaps into the lid. This chiller uses some kind of gel, and it stays cool longer. Good for a few hours.
I just received 4 of these containers in the mail, intending to use them for my family's lunches. Before I even took one of the containers out of the packaging, I noticed a statement on the box:  "FOR BEST RESULTS PLACE SANDWICH IN A PLASTIC BAG TO PROTECT FROM CONDENSATION." The purpose of a sandwich container is to prevent the use of plastic bags! It leads me to ask - What were they thinking? Or were they?? Sadly, these will have to be returned as I do NOT want soggy sandwiches or to use plastic bags.
This is an awesome item! Keeps things cold for hours and hours! No more ice block falling to the wayside in the lunch box! This product is also available at WalMart. I bought the smaller, circular one too and it kept a hard-boiled egg cold for 6 hours! And I mean COLD - as cold as when I put the egg in from the fridge!
I am not particularly impressed by the product. There really isn't enough "gel" to keep the food cold for an extended period. There are much better and more economical ways to do this.
its a good idea though will not fit a sandwich. should be a 2 inch bigger box on all sides.
These are terrific for my children's lunchboxes. I don't have to worry about turkey, ham, or anything that might spoil getting warm before lunch. Sometimes the children have even told me that the sandwich was too cold! They fit nicely into the lunchbox and you can pack yogurt tubes, cheesesticks, or other items that need to stay cold around the outside of the container. I like this container much better than containers that have the "cold spot" in the lid only. In my opinion, that does not keep the sandwich cold enough.
With this container, the gel that is frozen is in the bottom and the sides of the container. This makes much more sense since it surrounds the entire sandwich and keeps it cold. I cannot classify this product as perfect because two of the containers I've owned have cracked. One fell out of the freezer onto the floor and one of the sides cracked. I've only had the replacement container for a month and a half and I just noticed that the lip of the bottom portion is beginning to crack. This is disappointing since the price is quite high and I have 3 children who need sandwich containters.
I have owned several of these exact Lunch Chillers and am very happy with them. The freeze well and keep the contents cold til lunch. Sandwiches easily fit but it is one of the only containers that fits my Chobani greek yogurt containers and keeps it cold! The only reason I have had to buy a few is because I have dropped a couple while frozen and the edges have cracked. But that is by my own fault. Very happy with this product!
Answer: The gel/freeze material is in the bowl/base part not in the lid !