A tortoise drinks by immersing its mouth and nose and swallowing repeatedly for as long as 15 minutes. Don't be alarmed. Tortoises may drink at any time, so keep fresh water in a shallow, shaded dish at all times.
Tortoises often urinate after drinking or eating.
Along with watery urine they may pass a white to lavender substance. It may look gritty or like curdled milk. This is normal. Flush the urine from the water dish immediately and hose in any passed on the lawn where a tortoise might feed. The water dish should be at least 5 feet from any part of the burrow.