There are so many good choices out there. Just look for that ratio, preferably 4:1. I try to avoid brands that include a lot of additives, fillers, and antioxidants. A simple formula that I like is to add plain whey protein (I’ve tried both plain Tera’s whey and Bobs Red Mill) to lemon-lime drink mix. You have to do a little math to figure out the correct ratios. Mine usually ended up being about 40g CHO / 10g PRO, which translates to roughly 200 kcal. The lemon lime and plain whey mix tastes like key lime pie. You could try any number of variations on this (orange creamsicle?), but it’s nice and easy and you can water it down to make it less sweet. Plus, you replenish some electrolytes at the same time.