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good idea !  Ya maybe.  But I do not like them for a few reasons.  One being they do break down and you will have a bunch of white crap in your tub.  Second and I think more importantly.  More crap in our land fills.  If they could  be recycled then hey why not.  Otherwise I will stick with the regular ones.  Which I actually think are still cheaper in the long run.  If taken care of they can last years.  I  use two filters in my tub and have an extra set that I rotate monthly.  I figure I should get 2 maybe 3 years so for just under $200 cdn for 4 filters I will stay with what I am doing.  If I wend with disposable I would be $50 every three months so $200.00 for 1 year and that is also 8 filters in the land fill. NO THANKSbut thats just my 2 cents