Here is a great deal on the 5ml Stardust. This is a replaceable head system and ego threaded. $5.89 free shipping is an outstanding deal for a stardust with this capacity. I am not sure if the tube is glass or plastic but either way its a great price.
WHERE: https://www.fasttech.com/
THE DEAL:
Use coupon code TENOFF to bring the total down to $5.89