Drinking Bird (LSE) Demonstrate the relationship between pressure and temperature with our classic 15-070 Drinking Bird! The laws of physics come alive when our low pressure glass bird dips his head for another drink. He will keep on drinking until he can no longer wet his beak. As the water evaporates from his head, the cooler part of his glass body draws the liquid up to his head. This makes him tip down for another drink. MSDS available upon request, contains dichloromethane. Qty :