Metal should work too I think? Wont break either. 🤙 

 Watch out for cans - most are lined with plastic. Some steel water bottles are lined and most/all consumer filter systems use plastic parts @rejon 

 I know about plastic in cans issue. I was thinking of the inside of a Thermos or a Yeti.  

 It's known for decades. 

 Glass bottles and a Berkey! 
https://image.nostr.build/d3b785eba1c54a338cc5e88eff554727df15e26f65ad64d742e46f2212ff3753.jpg#m=image%2Fjpeg&dim=279x474&blurhash=%5DnONB%40of%7Eq%25Mof%25LD%25xu%25MM%7Bt7xuM%7BRit7Rjofofayfk%25MRjWBofWBWBozWBWBoft7ofWBWBayfRWBofofayxuofRjWBfQ&x=e538b01af5387434d02d29341a645947ac7df7b5262064ba7f7c465f48113246 

 Depending on where you live, tap water is probably the best option 

 Copper or silver is best to drink from 

 💯