If you come pick them up I can probably give you about 300 of the lids without holes... I stopped using them because I no longer felt like getting the fabric, cutting it, etc. If you get infested with mites (like I once did), then you'll have about a billion mites going b/w the fabric and the uncut portion of the lid. Feeding was a pain too. In the off days, when I don't use vitamins I like to shake some flies right out of the cup, I didn't like the material getting in the way.
I tried reusing the mason jars and cutting lids and putting fabric underneath (like Eds Fly), nothing comes even close to convenience of these lids.
But everyone likes what they like, if you like washing mason jars in a gas mask with dead maggots and rotting flies in your kitchen sink, have fun.
Here is the lid for those that don't know what the above post is talking about
IMHO you can't beat these lids. I think these are ultimate in convenience and practicality, anyone saying otherwise is full of s#$%.
Although the other methods do work this setup is easier and quicker to use then any other method. Yes it's a bit more $$$, but it's well worth it. If you can't or don't want to spend/justify the extra coin stick to what works for you. But then again if you can't justify buying a lid for few cents you should probably stick to collecting shells and coloured stones 
... yes I might be a bit ignorant... 
>>>>>>>>>>>>>>>..
ya fabric is what most people use; including me. like i mentioned all ya got to do is just cut a hole the size of a quarter i the lid and thats it.
Here in a couple months when i need more cups/lids im getting the 100qty from them. not the ones they list as insect containers but the ones i referred too.
