Cups and mugs in general....
GSI Cascadian plastic mug 2.5oz (simple, very cheap)
GSI Infinity insulated mug with lid 3oz (keeps coffee warm, big capacity, good bowl, bulky)
REI/Alladin insulated mug with lid 5oz (heavy, bulky, cheap, car camping favorite, coffee stays hot, good capacity, team it up with a Melita #2 filter holder)
REI Ti Sierra cup 1.8oz (a zillion uses, hot on lips, good bowl, tough, light, cheap)
Evernew 400ml mug with Snowpeak silicone guard 1.9oz (good minimalist boiler with Esbit wing stove, fixed handle adds to bulk, light, tough)
I'd like to get one of the double wall Ti mugs with folding handle and lid, but the price is steep. Good for coffee, can't cook in it.
The Evernew is the most universal and works for a "barely cooking" SUL overnighter kit rigged with an aluminum foil lid and windscreen, a Ti Esbit wing stove and a folding Ti spork-- a 3.5oz kitchen. It's enough for a cup of soup and some coffee in the morning. The GSI Infinity is the best for a big cuppa, stays warm, lid keeps the bugs out and a good bowl for dinner/breakfast.