IME, the lids of HDPE 2 bottles don't
seem to be made of the same HDPE plastic.
This kinda really sucks... btw, my example
Is an isopropyl alcohol bottle, the lid
melted in the presence of naphtha.
I use bottles like this. This one is 5000mL, its cap is made from
HDPE 2, and it even came with a PTFE sealing ring. I like to do a
long acid soak with 500+g of MHRB, then basify. After its been based
I'll split the mix in 2 at least. (It's hard to get in the big bottle to stir properly, and im not a believer in shaking) I've got a few other 1000-2000mL bottles
like this for smaller extractions.
https://m.imgur.com/gallery/J6G4dZKPrices for these bottles are reasonable and available on Ebay.