I have two UA amenity kits that I got flying in C (SFO-NRT & NRT-SFO) earlier this month. On the plastic wrap, housing the amenity kit, lists the items and their place of manufacture, here they are:
Bag - made in China
Socks - made in China
Eyemask - made in China
Ear Plugs - made in USA
Tissues - made in China
Mints - made in Spain
Marine Body Butter - made in USA
Toothbrush - made in China
Toothpaste (Colgate) - made in Canada
Romance card - made in USA

I also flew NRT-TPE-NRT in C recently and the "basket" had three items to choose from:
Ear Plugs - made in USA
Eyemask - made in China
Toothpaste (Rembrandt) - made in USA & toothbrush - made in China

iAMreallyBORED - made in USA... must be really bored today