Only option for me at my workplace is either coffee (undrinkably bitter) or expired tea (tastes like rot). Did not have enough time yesterday to make myself tea for the next day and the shop where I buy energy drinks is closed. I extremely drownsy and my head hurts.
EDIT: Coffee is undrinkable to me, quality or not. The bitterness will just overpower everything.
Bring your own tea into the workplace?
Tea bags are fine, but I recently discovered tea resin. It’s basically a small block of concentrated tea that you dissolve into hot water. Not quite as good as fresh leaves, but more portable (dozens of servings fit in a tin the size of a USB stick) and very resilient against going bad.
I have a small selection of resins on emergency stash in my work bag, in case the coffee machine at the office is broken.