Looking for a small refillable cyclinder for inert gas

I'll be using wide mouth 32oz and 16oz dark amber glass bottles. As chemicals are used I'll add glass marbles to take up empty space. When a quart-sized bottle is 3/4 full then I'll transfer the contents to three pint-sized jars and wash the marbles. No need to bother with inert gas... but be careful when pouring the last few ounces of chemical lest you dump marbles onto your work or down the drain.