1) While they’re usually fine with being put under high vacuum, a 4mL vial from National Scientific will shatter instantly if sonicated.
2) To remove a (slightly) frozen rotovap adaptor from the rotovap put your index finger between the upper lip of the adapter and the rotovap itself. Make a fist and the adapter should pop off cleanly. Otherwise, twist gently both above and below the joint (two hands) while pulling down with ~0.5 pounds of pressure.
3) The dry ice style rotovap cooling systems can use ice-water and house vacuum, saving tons of water and giving superior results over water aspiration/water cooling.
4) Always fill rotovap baths with distilled water. It prevents scale from forming on the walls and keeps the water bacteria free.
5) The faster the RBF on a rotovap spins, the faster solvent evaporates. This will actually suppress bumping for non-foaming compounds, but can cause bumping if the solution has been left to stand at vacuum. Always clamp both sides of the rotovap adaptor and start spinning at full speed before the opening the vacuum line.