Pure Crystal 1.5 L For cats, we adopted a newly designed top funnel (drinking mouth) easy for drinking cats who like water flowing in products that can be used for all-rounds, from kittens and small cats to adult cats. GEX Pure Crystal Bowl helps you to eradicate these problems! Using a water pump to circulate the water through a unique filter that traps dirt/hair/uneaten food & reduce odour & chemicals, your pets will receive clean, fresh & aerated water all the time.