Frozen acai packets can be found in the frozen fruit section of most grocery stores, if you aren't able to find it, just use more berries! (beyondthebite4life.com)
* I like buying the dragonfruit / pitaya smoothie packs from Whole Foods in the frozen fruit section. (noshandnourish.com)
I actually found marionberries in the frozen fruit section of our local Choices, but sadly they did not last long. (cookincanuck.com)