Hi Meller,Sorry ladies an dGents. I gorgot about this at work today, will have to knock it up and post pic on Monday, but essentially it's a length of PVC pressure pipe, and endcap, a threaded endcap with o-ring and lid. Very strong, light, reusable and cheap.
That is exactly what we had in mind. Couple that with a foam base to tie your frag to so it remains stable.
Thanks.