I have been reading about them also. I have been looking at the Stealth products. 5ml per sachet and around $25 for one and 160 for 8 depending on what you get.
You are suppose to draw it all out with your syringe and keep it stored there until you need it. Nice and flat for a trip through customs. The place where I saw them has had them for 6 months. I'm going to try them on my next cycle. If anyone has or is going to try them in the near future it would be cool to know if they are as good as advertised.
HDH
feedback on sachets 
Linear Mode
