Product review (5 stars): Lint traps:  simple, easy, works
I bought these when Walmart stopped carrying them.  I searched dollar stores, other Walmarts, appliance stores to no avail.  I am so glad to have these available online.  I bought the 12-pack and they are nearly identical to the ones I used for years.  They do the job of keeping my laundry stack clear of obstruction and therefore save major plumbing bills!  Well worth the investment.  I use only one at a time and it is good for several loads.  I have 4 longhair cats, wash blankets, comforters, throw rugs and bedspreads often, and usually only need to change the filter every so often.  To make it last, I put the trap all the way on the hose, and as it gets linty, I release more of the trap until most of the trap is full of lint.  Works for me and I haven't had a plumber out for the washer stack since I started  using these 10 or so years ago!