Product review (5 stars): If you have a humidifier, you need this
Keeps the algae out of the Humidifier, and does not give off an odor.

Note,buy this stuff in the 6 pack, much better unit price that way. I bought this&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/3-pc-Graduated-Cylinder-Set-10ml-50ml-100ml-with-plastic-guards-Class-B-Eisco-Labs-Borosilicate-Glass/dp/B00LU1DEVK/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">3 pc Graduated Cylinder Set; 10ml, 50ml, 100ml with plastic guards; Class B Eisco Labs Borosilicate Glass</a>&nbsp;to measure out what was needed as using the cap is a non starter for me. I don't want the bleachy chemicals on my fingers and this keeps things neat and tidy.