Servant Ceramics vessels are fired to Cone 8-10 in electric and gas kilns which means they are vitrified and perfect for everyday use. My glazes are lead-free for your peace of mind.
My vessels are food and dishwasher safe, but I highly recommend hand washing to extend the life of the vessels (if you are going to put them in the dishwasher, ideally use a delicate cycle without drying heat). Despite the glass-like glazed surface, the heat and power of dishwashers can effect the all glazed surfaces over time.
While I don’t openly recommend using my vessels in microwave ovens, (I cannot guarantee against what the extended exposure from the microwaves might do in the long term) I have occasionally used mine in our microwave and so far, there have been no issues or apparent degradation.
At home, Andrew and I used our bowls, plates and cups daily and avoid any staining type food or liquids on the unglazed clay or light colored satin surfaces.