H. Kennedy Stoneware bottle.

[ROBBYBOBBY64]

After Ida the river was still way too high but I braved the muddy banks to be first. I did find shards of stoneware but nothing whole, that was Friday. Monday I got this same bottle but whole. I like the broken one because I can see how they where hand thrown bottles. Can't understand why the sanitary issues...Lol! Here is a link to a bit of history on Henry Kennedy and Barrowfield Pottery.
ROBBYBOBBY64.
"Barrowfield Pottery - Scottish Pottery Society" https://www.scottishpotterysociety.org.uk/barrowfield/

 

[ROBBYBOBBY64]

Best cleaner for this stuff for me was a slurry of hydrogen peroxide and baking soda. Smear it all over the stain, in this case all over the bottle. I put them in a zip lock bag for 3 days. Amazing what deep set stains it draws out. Pro-tip #1.
ROBBYBOBBY64.

 

[Mailman1960]

Best cleaner for this stuff for me was a slurry of hydrogen peroxide and baking soda. Smear it all over the stain, in this case all over the bottle. I put them in a zip lock bag for 3 days. Amazing what deep set stains it draws out. Pro-tip #1.
ROBBYBOBBY64.

Does that mixture do anything to glass bottles?

 

[ROBBYBOBBY64]

Does that mixture do anything to glass bottles?

Not much. It is meant to draw a stain out of anything porous.
ROBBYBOBBY64.