Translation guide
A container for liquids, typically with a narrow neck, used in laboratories or for carrying drinks.
A glass container used in scientific experiments, such as an Erlenmeyer flask or round-bottom flask.
The standard loanword for any laboratory flask. Widely understood.
A small, flat metal or glass container for carrying alcohol, often kept in a pocket.
An insulated container for keeping drinks hot or cold, like a Thermos.
三角フラスコに溶液を入れる。
Pour the solution into an Erlenmeyer flask.
Means 'test tube', but sometimes used loosely for small flasks in non-technical contexts. Not a true flask.
This is not a flask; use only if the shape is tube-like.
Place the test tube in the stand.
The common loanword for a hip flask. Used for portable alcohol containers.
He carries whiskey in a hip flask.
Literally 'portable flask'. More descriptive but less common than スキットル.
A portable flask is handy for outdoor activities.
Means 'water bottle' or 'canteen'. Can be used for a flask-like container but usually implies a larger, non-alcoholic vessel.
Not specifically a hip flask; avoid if alcohol is implied.
I put tea in the water bottle.
The standard word for a vacuum flask or Thermos. Literally 'magic bottle'.
Put hot coffee in the thermos.
From the brand 'Thermos'. Often used generically for vacuum flasks.
Bring a Thermos to the picnic.
Literally 'heat-retaining bottle'. Used for insulated bottles, but less common than 魔法瓶.
This insulated bottle keeps warm for 12 hours.