I’m going back a long time ago. Some older members may be remember a punk/thrash band called Creaming Jesus. They were ahead of the curve, whilst other bands were selling tee shirts on the merch table they had mugs, tea towels and coasters.
Stereolab always have good merch. They’ve done coasters, tea towels, trays and even umbrellas. Their tote bags are a notch above as well - roomy with sturdy handles.
Got one of these inexplicably hilarious Forest Swords t shirts at the merch stall when he played Berghain (or supported Mogwai? can’t remember) which features simply a photo of Ringo Starr