I accidentally picked up the 375 ml Toaks cup a while back (I meant to hit "add to wishlist" but instead I hit "Buy with 1-Click"... I realized it a few hours later when I got the shipping notice...)
Anyway, the 375 ml mug is as described on the site. The weight is 2.2 oz (not including stuff sack), which is a bit much IMO, considering my MLD 475 ml mug is only 1.4 oz (not including stuff sack). Of course I could lose the handles on this mug and drop a little weight, but also, the walls on the Toaks feel a bit thicker than my MLD mug too, which I am sure accounts for a little extra weight.
The volume is around 360 ml when filled to the very tippy top.
Not bad for the price though...