I tried googling the difference between a flask and a bottle, but it hasn't really changed my intuition that there are things that are definitely flasks and there are things that are definitely bottles, but there are also numerous things where I wouldn't raise my eyebrows on any of them. Which also sets it apart from the dog-hound issue, since hounds are a subset of dogs, whilst neither is flasks a subset of bottles or vice versa. Of course I'm not a native speaker of English, so my intuition might be quite bad :D
- see also: http://duolingo.com/#/comment/74953
- you can say "Ich habe eine Flasche in meinem Team" ... not very polite ; i would never suggest to say something like this ... and everybody would say - you are arrogant ... "I have a loser in my team"
- "Ich habe eine Flasche" ... is ( without any further context ) in all cases -- "the bottle"
so you have to translate: "ich habe eine Flasche" -- "I have one bottle"
11 months ago (see earlier comments) flask was not accepted. I tried using it today just to see, if it would be accepted & it wasn't again. I'm going to report it as it seems a reasonable translation to me. I don't know, if others are doing likewise. I believe it has to be reported repeatedly for DL to change their response.
Flask is only 'a special type of bottle' in certain modern english uses, especially medical. But only connotatively! It is technically correct in English that every bottle is a flask. Though I concede that almost no one would use it that way in 'modern' English. As a native speaker, I use this word, though mostly ironically, since it 'sounds older', like 'thee' and 'thou' which are also still technically prescriptively correct, though descriptively 'outdated'. Source: http://www.etymonline.com/index.php?allowed_in_frame=0=flask=none