never used, not even once☺️ got this as a gift for Christmas hehe this is super convenient for people who love to work out anywhere.. you can carry them around empty, then wherever you are just fill them with water, and tadaaa ready to lifts weight.. however I don't lift weights😁 fixed price + free shipping and freebies Authentic Calvin Klein po eto :) #freedelivery3 #fit #sport #sports #weight #weights #skinny #sexy #workout #gym #accessories #practicle #innovative #diet #getfit #health #healthy #protein