Any glass or plastic container will work for your starter as long as it's big enough for it to double in size. The only type of vessel you can NOT use is one that is “reactive”, as in it will react with the acids in the sourdough to cause an undesired effect. A reactive container would be aluminum, cast iron (without the enamel coating), copper iron, or anything metal. The result would be a negative change in flavor and or appearance. I like a wide-mouth Weck jar or other wide-mouth jar for my starter, as it makes it easier to remove the discard and feed it regularly.