Nintendo 64 (N64) Tremor Pack Plus
These packs from Performance were interesting -- they contained both memory and rumble, yet they also contained a slot to plug in another pack, although we're pretty sure you couldn't use it to rumble and save at the same time. If you get four though, you can plug them all together into an odd circle. They're nice though for containing both features.
We have the following 2 variations of this product available: