One of the best and most popular stroller accessories are stroller cupholders or cupholder/console combos. They are mostly made of rip stop polyester or molded plastic and attach easily to the stroller with velcro or a simple screw like attachment.
In most cases the cupholder does not have to be removed when the stroller is folded.
Here is an example of a higher end cupholder/console combo made by Stroll-Air. It is shown on a Baby Jogger City Mini Single Stroller. The Stroll-Air console has insulated cupholders and a very nice structured look.
Here is a picture of the Jolly Jumper Stroller Caddy on a Bugaboo Frog:
Both of these cupholders have two places for drinks and a center console for change, cell phone, snacks etc. They are both equally functional but sometimes one fits certain strollers better than others.
As an aside, I would not put hot drinks in either of these-or in any stroller cupholders for that matter-because although they are pretty sturdy, I would not be willing to take the risk of it spilling.
Once you try one of these cupholders, you will not know how you managed without them- especially in these hot summer days when you usually have a drink with you.