Modern day conventional hot water bottles were invented in 1903 and are manufactured in natural rubber or PVC, to a design patented by the Croatian inventor Eduard Penkala.
Eduard Shevardnadze | Eduard Stiefel | Eduard Hanslick | Eduard Khil | Eduard, Duke of Anhalt | Eduard Buchner | Julius Eduard Hitzig | Friedrich Eduard Schulz | Eduard Zeller | Eduard Tubin | Eduard Spranger | Eduard Mörike | Eduard Kuznetsov | Eduard Heis | Eduard Dietl | Eduard Brunner | Eduard van Beinum | Eduard Taaffe, 11th Viscount Taaffe | Eduard Suess | Eduard Steuermann | Eduard Sievers | Eduard Puricelli | Eduard Prchal | Eduard Pechuël-Loesche | Eduard Nalbandyan | Eduard Knoblauch | Eduard Gufeld | Slavoljub Eduard Penkala | Raphael Eduard Liesegang | ''Lehnin Abbey Ruins'': Eduard Gaertner |