I also use my titanium pot as a "do all", but also bring a mug for a cuppa while I'm cooking my dinner in the pot.
Personally I find that 200mL is a little small for my daily cuppa or soup, and prefer a mug size > 400mL.Sea to Summit
Note that the S2S X Cup
is the one that is 45g - this one has a relatively small capacity of 250mL. The S2S X Mug
is the one that weighs 60g - this holds around 430mL and is better for soups imho. I have the X Mug, but if you want a cheaper version, Kmart has a copy in their Collapsible Dinner Set 3 Piece (which includes a folding plate, bowl and cup). The Kmart cup weighs a little more than the S2S at about 65g.Running "speedcups"
The mentioned running cups are lighter (usually around 10-20g), some made of TPU, and some made of silicone, but they are thinner and most have a modest capacity of 150-200mL. I have checked out the Hydrapak and Salomon versions. The running cups being thinner make it more challenging if not downright impossible to hold safely when filled with hot liquid. In addition, some of the designs are primarily for running so don't stand up well by themselves when filled.Foldacup
I have another called the Foldacup, made for the Swedish army. There are 2 versions, the small at 250mL weighs around 24g. The large version has a capacity of 600mL and weighs around 48g. Made of TPE it doesn't fold as flat as the silicone versions. Your mileage may vary, but I found that the TPE transfered a slightly plasticy taste to hot liquids though, but it might have been when new. Others
I am also currently testing out a new silicone sealable container I got recently as a foldable mug/cup. With a capacity of around 450mL, and weighing 68g, it was designed for food storage in the fridge. I was after something that I could shake when I mix powdered electrolytes or flavoured drink powder on the trail. Putting powdered mix in my current cups, filling from my hydration bladder and stirring with my finger usually left clumps of unmixed powder at the bottom of my cups. This silicone container has a "seal" top, but it isn't a good seal however - it will pop open at the slightest touch. While it will stand on its own when filled, and it is possible (though not comfortable) to hold with hot liquids, it is not as good as the S2S X Mug in my opinion. Also drinking from it is challenging as the seal gets in the way, but I have worked out a method of folding the top over to get a smooth drinking lip. I haven't quite made up my mind about this one yet but it also came in a set of 3 (700mL/450mL/235mL).
My current favourite lightest mug option is a repurposed "instant noodle" cup. I got this on board an Air Asia flight a few years back, cleaned out the cup after use, and have taken it with me on a few trips as my UL mug. It isn't collapsible, but holds hot and cold liquids to about 450mL and weighs around 16g. I made some sharpie markings on the side for various levels but they have mostly been rubbed away now. The cup has taken a battering inside my pack over a few trips.
Pic with the Swedish Foldacup, S2S X Mug, silicone container & instant noodle container. Links
Kmart version mug https://www.kmart.com.au/product/collap ... ce/1744802
Foldacup https://www.backpackinglight.com.au/wil ... 590ml.html
Silicone Container https://www.ebay.com.au/itm/Reusable-Si ... 3198550801