Isosteel VA-9558 Auto-Insulated 0.4 L of double-walled 18/8 stainless steel incl. Plastic cover with drink opening and non-slip base (household goods) 5
Good workmanship and thanks to stainless steel also very easy to wash off. Only the plastic cover comes off a little easy, could have been a little tighter (or with a thread), but because I never use the drinking spout, which is actually not so bad.