Can used glasses be used that were purchased in 2nd hand store..and if so do they need to be toveled?
You can use drinking glasses that were bought in a second hand store, and they do not need to be kashered. The reason is since drinking glasses are usually used as a kli sheini, which essentially doesn’t need to be kashered according to many poskim, coupled with the fact that we glass doesn’t really absorb.
You would have to tovel the glasses, with a bracha. The reason being that we readily assume that assume that the glasses were owned previously by a gentile, or by the store owner who is not Jewish
M:B Shar Hatzion 451-10,