These copolymers are extremely viscous (sticky) in their "dry"/neat state due to their low Tg. The best method to transfer to a new container is to dissolve in the original packaging (e.g. adding 5 mL of saline to ~1 g triblock would yield a 20 % solution) and then transfer the solution of known concentration. The preferred method of transferring an aliquot to another container is to gently warm the gel to ~37 °C for a brief period until it softens to where it can be poured from one container to another.

This kind the system is really difficult to sterilize. Normally you can not use autoclave sterilization or filtration.

You need to put your material in a open vial inside of the container with alcohol and let for 24 hours. The alcohol will evaporate, and the alcohol vapor will disinfectant everything inside of the container (included the polymer).

Мix the polymer and water in the mass ratio you are interested in; аpply the polymer gently to the walls of the tube. Кeep in the refrigerator with constant stirring. Аfter a few hours (10-20) you will have a (perfect) solution.