Product review (5 stars): Use to REFILL your original product plastic container  -  Saves you money
This refill is GREAT!!!  I purchased the original many times.  Then I found this refill.  You simply unscrew the top of the refill, which opens the hole, and unscrew the pump top off the original and pour the product into the original plastic.  Then screw the pump top back on.  Very easy and SOOOOO economical.  The same amount of the refill saved me $30.  Cheaper and free Amazon Prime shipping.  I still had a little bit of product in my original plastic bladder so I simply poured about half of the refill in and saved the rest for when the level gets lower.  This is not rocket science folks.