Blue silicone rubber. Double sided. Sit firmly on the bench and with bowl either side to hold different size flasks. Hold flask firmly but gently, irrespective of the angle.
| Size | Bowl Diameters | |
| Wide | Narrow | |
| 1 | 76mm | 44mm |
| 2 | 121mm | 80mm |
| 3 | 165mm | 181mm |
Supplied as a set of 3 (one of each size).