jiuwu silver essential oil roller bottles set with stainless steel balls, 8 pack 10ml leakproof glass bottle for perfume aromatherapy oils travel container vials 2 funnels + 1 opener jiuwu * material: glass<br> * capacity: 10ml<br> * roll balls are made of stainless steel, well-made.<br> * roller bottles with leak proof design metal roller balls and screw caps.<br> * you can diy your own essential oil perfume receip which is 100% handmade. perfect for home, travel, office and so on various occasion.<br> * this leak-proof, 10ml (1/3 oz) roller bottles set with all the tools you need is convenient and economic.<br> * you can put it in your purse or suitcase to take it to wherever you want, and don’t need to worry about the leaking problem.<br><br><b> how to use the bottle opener:</b><br><b> step1:</b><br> removing the orifice reducer insert: put theedge of the opener underneath the reducer and push down.reducer would pop out.<br><b> step2:</b><br> closing the orifice reduce insert: once the reducer pops out, please find the suitable hole in the center of the opener. then place the right hole on the top of reducer and press down.<br><br><b> * package include: </b><br> 10 x 10ml silver glass roller-on bottles<br> 1 x bottle opener tool<br> 2 x funnels<br>