just a few silly questions about the NATO gas masks canteen adapters :
- are all the NATO (UK/US/DL...) canteen plugs and gasmask drinking straws compatible?
- I can't see any hole at the end of the drinking straw of my British S10 respirator. There's just plain looking cylinder with a kind of O-ring at the end, is the opening just unlocked when the straw tip is inserted into a special bottle cap?
- I've found on various Web pages that only the UK "pattern 90" bottle is compatible with the S10 straw, not the easier to find pattern 58. I've also seen a "Avon" bottle on eBay and a civil looking bottle used with a S10