Astro plastic top

[wazzer]

Hi all, I got a Astro bottle only today from the car boot sale.

It has a strange plastic top unlike any I have seen before.

Whilst I have the normal alloy one and the smooth plastic version, this one has a black plastic top which is shorter than normal and it has 6 ribs running vertically down it.

Does anyone have any info on this version please?

I don't mean the aluminium cap but what seals the bottle.

Waz

[☆VixenGypsy☆]

Can you post a pic, please. Our Goo Heads can give you a better answer that way.

[wazzer]

Hi will do, any help will be welcome, Waz.