Off topic, but you can likely get those bottle jacks working again by adding some hydraulic fluid to them.(transmission fluid works well) You will have to remove the plug - it typically looks like a flat head screw.(some just use a rubber plug) Set the jack on its side with the plug on the top, then add the fluid through a small funnel or use a steady hand and run a small stream of fluid into the hole until full. Replace the plug and you are good to go.
