This cup has been officially classified as a work of art in its home country, Sweden – which it certainly is. It is a folding coffee cup which folds down to just 1″ (2.5cm) high but it weighs just 25 gram (which is well-nigh impossible to beat for hiking). It holds 237 mls just shy of a ‘regular’ cupful (250 mls) If this is a bit small for you it does have a ‘big brother’ (or sister) which holds nearly two cups full (591 mls = 46 grams). It costs less than A$5. Comes in a variety of colours. I liked this one = desert. Wildo also make many other useful hiking utensils. You should take a look at their range.
It would make a great companion piece to those showcased in my last two posts: https://www.theultralighthiker.com/2019/10/19/best-coffee-on-the-trail/ & https://www.theultralighthiker.com/2019/10/19/most-beautiful-ultralight-windscreen/
And of course you need something to boil the water in such as https://www.theultralighthiker.com/2016/01/26/cookset-woes/ or https://www.theultralighthiker.com/2017/09/18/ultralight-cookpot/