It can last for one month

[tufguy]

Do we say "Do you think that this soap, detergent or supplement can last for one month"? If we want to ask whether it is enough for one month.

 

[MikeNewYork]

Yes, but we might say "a month".

 

[emsr2d2]

I don't think "can" is appropriate there.

Do you think this bottle of detergent will last a month?
Do you think this bottle of detergent would last a month?

 

[MikeNewYork]

I have no problem with "will" or "would", but "can" also works for me.

 

[Raymott]

"Do you think we could stretch this soap out for a month?"

 

[Tdol]

If you mean three different things, then why not use will all last a month?