Open the can?

Paul and Max brew a beer from a kit with malt extract..

Paul reads the instructions: Let's see... that can is the malt extract... boil that... add hops... ferment...

Max dumps the can in the pot.

A few weeks later

Paul and Max sample their homebrew.

Paul: Nice hop aroma!

Max: True, but lacks a bit in body.

Paul: I don't care for those malty sweet beers anyway.

Max: Hops rock!

Paul: Doesn't pack too many calories.

Max: Very clear. Can't stand murky beers.

Paul: Right.

Max: Yes.

Paul: Should we open the can next time?

Max: We could... But this way the stuff lasts longer...