Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Can the lunch bag collapse after it is emptied to fit into a backpack?
Document: Great lunch bag.... Wish it was just a little bit bigger to be able to fit more snacks inside. I do like the strap option too!
I LOVE this bag. I bought it to fit the Ziploc sectioned containers I use and it fits exactly. Not too big, not too small. It does a great job of holding a ton of food (and I bring a lot) and is super cute to boot. Everyone at work keeps asking where I got it. :)
Very cute.. Looks just like the picture. Thermal insulation is very good and keeps food cold all day. Thought I would use the shoulder strap but I don't and have no reason other than its kind of flimsy. My rating is based mostly upon the size. I can fit a small and medium Pyrex bowel in this bag with a small drink and slim ice pack but not much else (piece of fruit or yogurt container forget it).
The best lunch bag you will own! Fits everything! And no need for refrigeration the whole day! And I'm from hot QLD Australia!
Love this bag. Opens wide with plenty of room for an ice pack and your lunch. Keeps everything cool for hours.
The bag is great it does not look like a lunch all my friend s love it make sure I let them know I purchased it on Amazon
This lunch bag is a great size, accommodating my bulky salad and yogurt with room for fruit and snacks--even a large banana. It's sturdily made, including wire frames along the top zipper that help it keep its shape and zip easily.
I really love this lunch bag. It's spacious inside- fits glass tupperware well along with a drink or else whatever multiple items you're bringing to work for the day. I really love the ikat design as well and the handles/option of a longer strap are great for when you have  a lot of bags. This is a very cute and nicely made lunch bag. It makes me happy :-)
Should fit what I need it to, although smaller than expected.
Very happy with the product, exenlent material I love the size, I can put a container with the sandwich, fruit, cookies and the water, fit everything!!!! !
Answer: Quite comfortably, unless your backpack is terribly small. There is not any hindrance to fold the lunch bag flat.