Plastic beakers (Kenilworth CV8)

I am looking for some plastic beakers to use to serve water to runners/walkers after completing Leamington parkrun. We already have lots but as our event is getting bigger and (hopefully) warmer weather is on its way, we could do with some more. We used to use disposable cups but the amount of plastic we were throwing away (to recycling) was awful so we have changed to beakers that we can wash and I thought if we could reuse some rather than buying them new that would be even better. Thanks.