1. Material: plastic 2. Environmentally friendly plastic material, safe to use 3. There are gaskets and leakage holes inside the bottle, not easy to leak, rest assured travel 4. Wide water tank, easy to drink, press the water, downward fluctuation lock water 5. Easy to carry, not easy to leak water, water and food, pets have to eat and drink when going out 6. One-handed press to dispense water, easy to use, not finish the water can be re-pressing recovery 7. Weight: small 320ml +180ml about 176g, large 500ml +180ml about 194g 8. Size: small 320ml +180ml about 22 x 7.6cm, large 500ml +180ml about 27.5 x 7.8cm 9. Note: shipping only the feeder, does not include other