Amazon offers its Amazon Prime members the Mr. Root Beer Home Root Beer-Making Kit
, model no. 20041, for $14.61
with free shipping
. (Non-members can spend over $25 for free shipping; otherwise, shipping adds $6.17.) That's the lowest total price we could find by $1, although it was a buck less last summer. It includes one bottle of root beer extract, two packets of flavor crystals, one packet of root beer yeast, and more.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.