Just clear glass would suffice if your storing in a freezer.
For long-term storage, dark glass is a much better choice, since light is one of the factors that can cause breakdown of nicotine. It's dark in there most of the time, sure, but sometimes you open the freezer, so there's light. Mine is in that amber glass, inside a taped-shut box (the box the bottles came in!), so little if any light gets to it. If you put the clear glass bottles into such a taped-shut box, that might suffice.
Andria