They are vinyl molds made and i am a artist and all i really need to to ask you a few questions to get and idea for a design. Like favorite color fairly general stuff. and no a removable vinyl head is not air tight like a mason jar. So you need those stinky proof baggies if you shoving buds up in thee but hash would be fine in it. I have be problems shipping international as long as you read my international agreement clause which shouldnt be an issue with these. I set a skull to Australia end last week and to England this weeks end. Well I see there is interest I'll start getting supplies ready like my sculptey clay and color changing paint pigments mutli glow in the dark colors and I have a tub full of every color of acrylic paint you can think of. I preview the first one friday because i already promised priscillamarie90 one last week. I didnt want to buy a bunch of supplies and no one be interested. ok thanks guys for the input. X) nomad