Wilkinsons are selling stainless steel tea/coffeee/sugar constainers with lid; capacity, dunno but between 0.5 to 1 l I reckon; for about £ 3.

Now it shouldn't be too difficult to solder/fit on some hose connections et voila, a very nice looking shiny locost catch tank.

Mines an Ex Cleaning fluid bottle, didn't even bother soldering/fittin pipes...drilled three holes...one in lid for small KN filter two in the side for the breathers. Just pushed um in..rubber seal well...
et voila!!

:~)

Pound stretcher also sell aluminium drinks bottles (for bikes etc) which have a removable pull up thingy for a pipe.