Use a can opener to slit open a blister pack:

I wish that I had known about this when I bought the LuMESH three-fer set from Costco!  And yes, I’m looking forward to the collaborations between Costco and Pati Dubroff and Jenna Hipp.  Despite what Allure says about these collections becoming available this month, Hatch Beauty says that they won’t be available until next month.  No word about the blister packs, however! 🙂