How to chill a keg of beer<br>Prepare a tub for the keg. To chill a keg, you will need a large, durable container into which the keg will fit with a little room surrounding it. The best option is buying a specialized keg tub, which can be found at many liquor stores and home brewing supply stores.
Buying kegs online is the best way to get them quickly.
This is a matter of opinion.  The prompt mentions the 'best option' being a specialize keg.  But didn't say the 'best' option for where to buy it.
( z1 way :manner-of ( z2 get :ARG1 ( z3 keg ) :ARG1-of ( z4 quick ) ) :domain ( z5 buy :ARG1 z3 :medium ( z6 online ) ) :ARG1-of ( z7 have-degree :ARG2 ( z8 good ) :ARG3 ( z9 most ) ) )