Selmer Tuning Slide Grease is the best slide grease out there. One bottle can last 1 year on a trumpet if use right amounts, because if you put very little and you spread out the grease on the slide properly you will have fast action slides for a month or two and you should buy this product.

Oder free, generous amount per bottle, long lasting and high quality. Only down side is the bottle invariably develops tiny holes in the corners, causing grease to leak everywhere. But for a couple bucks, you'll still get a year's worth (or more) of slide grease.

This is great product for use on new clarinet/saxophone cork. It extends the life of the cork and mellows quickly. One word of caution; you may not want to allow beginning players to use it without supervision. If too much is used it can cause the cork to slide off! :)