These were purchased from www.aliexpress.com
20ml plastic bottle
https://www.aliexpress.com/item/Best-Promotion-Empty-Plastic-Alcohol-Oil-Squeezable-Liquid-Dropper-Bottle-With-Needle-Tip-Cap-Loop-15/32694986911.html
Post time: May-17-2017
Post time: May-17-2017