When I first started playing with e-stim, I got another popular brand, 306 electro-gel. Both are good conductive gels but E-Stim Electrogel is also sterile which means you can safely use it internally -- a huge plus! The unexpected bonus is the pump bottle itself. It's so much more convenient than a squeeze tube because you only need one hand to get a squirt of gel. I'll be getting more of this for sure.