@
melhoune
@
Cristina
I'm in the food industry...you can dig around online to find this all out but it may take you a while to get all the info....so, maybe more than you want to know...
Generally speaking, the olive oil will be fine in a food grade PET or HDPE container, as long as you use something of Nalgene quality for leak proof. The type of leaching you may have heard about is from the type of plastic called PVC - you wouldn't want to use it for most food of this type regardless.
If you're concerned about BPA, choose a container that is free of intended BPA - it should be easy to find now in Europe & the US.
For packaged food sold in California there is a law mandating BPA disclosure, so most food companies that sell in the US have eliminated BPA from all their packaging OR they disclose it on the package, so that they aren't making two different versions (ie, CA & non-CA).
Edible food oils need protection from oxygen and light. They won't make the food unsafe but they will change the flavor (oxidation rancidity).
Oil is commercially packaged today in darkly coloured PET by several companies. PET has high clarity (basically, it looks nicer). There are metal cans with thin plastic based interior coatings that are also fine. Glass is fine. Buy only what you can use within a year or so for best taste.
If you're buying a container to put food into, be sure it's labeled/sold as food grade and note whether it can be heated/frozen or not. For the oil, pick PET, HDPE, lined metal sold for oil, or glass.
Glass is basically chemically inert and is an excellent oxygen barrier...but it's not a light barrier, is heavy, and fragile.
Lined metal is very good oxygen barrier, excellent light barrier, less heavy, less fragile.
The plastics are ok to good oxygen barriers & light barriers depending on type and colour, lightweight, and less fragile.
Pick the one that works for whatever you're doing. For a travel kitchen, I'd pour in fresh oil for each trip, if you're not traveling/using constantly.
Keep oil in a cool/room temp dark place and tightly sealed to preserve quality.
ETA: if you want to read about Nalgene's history and why they have leakproof bottles. I toured that Rochester factory a very long time ago....
https://www.insider.com/sc/nalgene-a...history-2019-6
Making glass vs metal vs plastic containers is very different in terms of equipment & expertise so usually you'd only see one company doing more than one because they bought a separate company at some point.