Product review (3 stars): Necessary, but watch the price fluctuations
It hurts to buy these silly things...but I don't think you can wash & recycle them.  If they help save my cheesecake or almond milk from strong odors like onion or taco meat, then I'll get them.  Watch the prices though...They fluctuate quite a bit.  Just add it to your cart, then move to the "save for later" and then you can watch the price fluctuate.