Varny hnizdo stoji novy majlant, ale v bazarech to tak hrozny neni: https://stroje.bazos.cz/inzerat/108837351/Topne-hnizdo-250ml-lths.php - napriklad... A obcas staci stat u spravny popelnice, kdyz se rusi laborka(ne, nevenuji ani neprodam)
EDIT: hele, cinan jeste levnejsi a i s michadlem: https://www.ebay.com/itm/Laboratory-Lab-Magnetic-Stirrer-with-Heating-Plate-85-2-Hotplate-Mixer-220V-UK/352661789730?hash=item521c47dc22:g:JakAAOSwnItc1yqZ