A microwell plate is described, including a frame 2 that has a frame plate 4 made of a first material having holes 2′, and a vessel 3 formlockingly connected to the frame plate 4 and made from a poly(aliphatic ester)-polycarbonate including soft block ester units, derived from monomers including an alpha, omega C6-20 aliphatic dicarboxylic acid or derivative thereof, a dihydroxyaromatic compound, and a carbonate source.