the rim makes me think not an eye bath - all those that I can see have an elliptical shape, and the capacity of this one looks larger than most. Too small for cigarettes, and too large an opening for an inkwell, and probably too small a capacity for a salt.
I'd suggest mid C20 and agree quite likely a novelty tooth pick holder - tooth picks look to be very similar to cocktail sticks, so imagine reasonable quantity would fit in this one.
perhaps this designed to pass round at orgies - but think the extra tooling for male version would preclude it as a profitable venture.
