Our three original flavors in one box, for finding your favorite before you commit to a case.

Grapefruit: bright and sharp. Blueberry: smooth and rounded. Citrus Tea: crisp citrus over black tea. 6-pack: 2 of each flavor. 12-pack: 4 of each.

The CircaFLOW™ blend pairs a solid 225mg of caffeine with Dynamine™ and TeaCrine® for a layered release of energy. Dynamine™ comes on first, caffeine carries the middle of your shift, and TeaCrine® extends the tail so the energy tapers instead of dropping off. Completing the blend: L-theanine, tyrosine, taurine, ginseng, inositol, adaptogenic mushrooms, huperzine A, and B vitamins. Zero sugar, 10 calories per can.

Made for nurses, physicians, medics, firefighters, police, and anyone working 12-hour nights, warehouse shifts, or long overnight drives.

Created by Dr. Thomas Jeider, an ER physician who has worked nights since 2010.

12 fl oz cans. 6-pack or 12-pack, $4.29 a can, shipping included. Subscribe and save. Order by 2 p.m. Eastern and it ships the same day (Mon to Fri).