Travel parterner:the bottles are portable and lightweight,conveniently fits in your purse, handbag or suitcase,great for business trip or travel. Widely application:Ideal for DIY your own body milk, deodorant, gel, dense liquid,lip balms,etc,Not suitable for liquids such as water and essential oils. Plastic roller ball:the plastic roller ball have a massage effect,Smooth rolling.and can avoid pouring out a lot of liquid at one time. High quality:the roller bottle is made of high quality plastic material,sturdy and reliable, not easy to break, safe and durable to use. can be refill. Package included:you will receive 8 pcs Plastic Roll On Bottles,Capacity: 50ml/1.7oz,size:app.40mm*100mm,enough to meet your daily use.