Does your research involve cloning, CRISPR, or other techniques that require the purchasing of DNA or RNA oligos?
It´s generally recommended to keep your oligos at -20°C for long-term storage -- but dry oligos are actually stable at room temperature for many months.
That´s why your oligos can be shipped at room temperature if you order them dry.
That translates into a significantly lighter package (no ice needed and less package material) and thus reduced carbon emissions from the shipping.
And if you want to reduce shipping emissions even more, you can consolidate your orders so they can be delivered in one go.
So next time you are ordering oligos, maybe you can drop your lab mates an FYI email first?