Hot water in a jar?

[rvpopeye]

I once took a shower using water in a 100' garden hose that had been left out in the sun....
I always wanted to try a piece of big PVC pipe on the roof painted black method , but anything painted black would probably work fine for heating any liquid (even air) .

I might choose plastic instead of glass for durability reason only..

Definitely glass for sun tea though.