Dharma Wheel Coaster + Holder

So i tried printing coasters as a housewarming gift for my aunt and her husband, but i wasnt satisfied with the results on existing ones i tried (base too thin, walls too thin which causes holes in the PETG on top, no border on the coaster itself to aid in glasses not getting knocked over as easily, etc).My aunt is really into eastern things like Buddhism and Hinduism, but also new age things. So i drew a Dharma wheel symbol as the floor of the coaster and left a 1mm edge above it to avoid things getting knocked over as easily.The holder will hold up to 6 coasters inside it, you could probably fit another 2 by the lip but it wouldnt be very secure.Dimensions: 90x5 mm for the coaster, 100.24x93.4x43.94 mm for the holder.