PVC-plastic Habitat 8 ounce bottle fits into the molded cavity of most habitat homes marketed for pocket pets. Clear as glass bottle allows excellent view of water level. Non-toxic plastic float instantly indicates low water levels. Fits the plastic carry-along pocket pet keepers that are popular with all ages. Features stainless steel Ball-Point Tip drinking tube unit with two corrosion proof stain-less steel balls. Complete with black rubber O-type retainer ring.