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

Input:
Question: does it only work if your fruit and veggies are uncovered and loose in the drawer?  What if you keep lettuce or grapes, etc in a zip lock bag?
Document: These work great! I was VERY shocked by how well they preserved my produce. They last much longer than I expected. I purchased a bag of grapes and had them in my bottom produce drawer, forgot about them (lord knows how!). Anyway, they were in there for over a month and were still fresh/firm when I re-discovered they were in there! To me that is just crazy!! I definitely recommend these and will be a lifelong user.
I like that this comes with two. I put one in my fruit bowl and one a drawer in my refrigerator where I keep my veggies. Perfect for a single girl who finds it hard to eat all my fresh fruit and vegetables before they go bad.
I have four of these. One is a plastic bag with lemons and limes. One in the bowl of apples. One in a plastic bag with veg (e.g. onions, tomatoes, green peppers. Etc. They work as advertised.
These little things actually work! I find they work better if you don't crowd them. I try to sit them on top of my produce with NO MARKET PRODUCE BAGS in there at all. They keep peppers and lettuce and kiwi fresh and delicious!
These things are amazing! I put them in a bag w/ my bananas and they last well over a week without turning brown, I also put one in the drawer of my fridge with my fruits and veggies and everything seems to last a few extra days, if not a full week. Small so they don't take up much room, AND they come with a year of refills- great value! I'm thinking of buying another set so i have them in the 2nd drawer in my fridge!
Really help to keep my veggies fresh! I bought some mushrooms and loose arugula from the farmers market and a week later, they were just as fresh as when I first purchased them. Quite pleased!
I was excited about this and amazed about how well it actually does work to keep fruits and veggies fresh for months!! !
This product is awesome. I put it in my fruit drawer in the fridge and one week later my peaches were still perfect. Ate those and bought more. I added some grapes 3 days ago and they are good too. Now I'm experimenting with celery. Put the celery in 3 days ago and it's still crisp.I just put it in the same drawer as the fruit and so far so good. I should have discovered this product a long time ago.
It works as advertised. I sometimes over buy fruit and vegetables (Sams club), and hated to waste any food. Got these for each drawer and for my fruit basket for the counter. These keep everything fresher a bit longer.
I live by myself and sometimes it's hard to get through all my veggies and fruit. I get kinda crazy when I see great looking produce. I want, I want! My raspberries and strawberries will keep at least 2 weeks. Enough said.
Answer: I've tried it a few ways and can tell you this: fruits like apples, oranges, pears, plum, peaches do well just being in the drawer with these. I put celery in another drawer without a bag and it dried out. The lettuce is in a plastic bag as are the carrots and they are doing well. I have onions in a brown paper bag and they're good too. However, I don't close the bag like a zip loc. I use the plastic bag you get in the supermarket when you are picking out your fruits and veggies and leave it open in the drawer with these little apples. I've had an orange in there for 3 weeks now and it's doing well. That's my test case. The other food has been eaten. Oh, I do have grapes in the bag they came in for a week now and they are as good as the day I brought them home. Long answer but this has worked for me.