What are you doing for dry tubes?

[prid1279]

I have a trip coming up that involves a couple of long sumps, Cocklebiddy Cave. 1 km and 2.5km between rockpiles/air chambers that need to be traversed to continue on. Need to carry some gear dry to eat and stay warm.
We have a couple of dry tubes that have been around for a while. I have just finished making another one from a couple of failed ally cylinders. A couple of pics below, pretty happy with the outcome but it took me a long time. Just wondering how others have overcome this issue and how much success you had. What do you use? Do you make them? Get them made? Found somewhere to purchase something similar?

 

[lostsheep]

That’s a cool tube, good job.

I think the only way to make that easier is to befriend a machinist. A good size engine lathe would make short work of that

 

[prid1279]

2nd attempt below, much less time on the lathe. Can take an 8.5kg load to be neutral in fresh water.

 

[Snusmumrik]

Not being a caver, but IMHO. Did you try blind-plugged BB20 filter case?

BB 20" filter housing - FITaqua

A prefilter housing for puryfying cold water (2 - 45⁰ C). Accommodates various 20" filtering cartridges (sediment, spun, carbon).

fitaqua.com

 

[evandroairton]

tecme.de in Germany make some really nice machined drytubes, but is far from home and probably costs more
Anyway, very nice tubes!!!!!