One of the pieces of equipment I carry with me in the Eriba is a Braun 'MultiQuick' set. Doesn't take up a lot of room and doesn't weigh very much, but basically provides a whisk, chopper, jug and stick blender which extends the range of things I can prepare. You can see what I mean here:
https://www.amazon.co.uk/Braun-MultiQuic...raun+multiquick
There are other similar products, of course, but I do find it very useful, even if I only use it every now and then...