At Coles (local supermarket...)I found two sizes, one is under 10 g holding 175ml, the other I think it holds 100ml and would be about 5 g.
This would help in lowering again the weight of an alcohol set up for one to 3 days or so .
Took me a long time to find it , in fact I did the supermarket 3 times except for that particular corner where overprocessed yogurt is. In France where Frencie (...) is they have fruit puree in them.
BTW, it is made out of aluminium foil with a plastic cap. Somewhat similar in weight (proportionally) to the Platypus collapsible containers but almost free.

Franco