I've got a whole bunch of these, more than I can ever possibly use, and would like to reclaim some storage space. PETE is the most oxygen-impermeable plastic I know of, and is the same material used to make soft-drink bottles nowadays. I'm not sure what the caps are made of, probably HDPE, but they're quite thick so provide a good oxygen barrier as well. Both sizes are square and take up less shelf space than a round bottle comparable volume.
30 x 500ml bottles, $10 plus shipping per half-dozen, $40 plus shipping if you take them all.
23 x 1000ml bottles, $15 plus shipping per half-dozen, $50 plus shipping if you take them all.
If I find that 24th 1000ml bottle I'll toss it in.
It's probably not worth the money to ship these outside the US, but I'm game if you are.
I'm going to hold back six of each for Ralph. That leaves 18 of the small ones and 11 of the big ones (I'm still hoping I can find that last bottle, I'd swear I started with 24).
18 x 500ml bottles, $10 plus shipping per half-dozen, $25 plus shipping if you take them all.
11 x 1000ml bottles, $15 plus shipping per half-dozen, $25 plus shipping if you take them all.