https://hoppydaysbrewingsupplies.com.au/product/crown-headmaster-425ml-schooner-glass/
https://hoppydaysbrewingsupplies.com.au/product/crown-headmaster-425ml-schooner-glass-box-of-48/
their courier is real cheap, or if you don't want to risk it, pick up at Virginia
Also bare in mind that your rainwater maybe receiving additional input from fowl that may fly above the earth in the open firmament of heaven.
Not just elemental, but also bacterial