working well for my moisturizer [SEP] i got this to apply moisturizers and toners that come in liquid form and are sometimes sort of awkward to apply this method seems less wasteful than a cotton ball so far this is working pretty well for that purposethe jade ball is nice the bottle looks like glass but i think it is a thick plastic and it has measurements listed on the side the black top is plastic and i am hoping that holds up it might be a little thin where the roller is where you screw and unscrew it that feels a little weak so far it is holding up okay though there is also a clear plastic lid the product page seems pretty serious about keeping the bottle stored upright but the box does not mention that i can see how fluid would come out though so i am not pressing itthis seems pretty good for my needs and i would recommend it if you need a roller for something you have to refill often you might want something with a stronger screw top but for a thin toner or moisturizer this is working well so far i will update if i have any problems