Maybe PTFE containers
Use Aquaregia
Foam container will keep it hotter. The air bubbles in the foam act as an insulator.
There is no real time limit.
solid
it is ice chest
gold is dissolved when it is kept in aquaregia
Aquaregia will do it.
Use Aquaregia
Nitric and hydrochloric acid
A thermos is a container that will keep beverages hot.
aquaregia is a highly corrosive as well as fuming liquid and it is able to dissolve gold and pkatinum. it is freshly prepared by mixture of con. HCl and con. nitric acid in the ratio of 3:1.
You will want to use a refrigerated container to keep them from molding.
it is where you can keep money
as it gets dissolved in aquaregia(HCl+HNO3),it shows a peculiar behaviour
a solid
you can keep it in a rubbermaid container for a couple days if absolutely necessary. keep it out of direct sunlight and store in a shady place.
regular container that you would use for food and to keep bugs out!