Swiss Navy® lubricants are unique compared to other water based lubricants. It applies like a gel but liquefies with friction. It is safe to use with condoms and toys. It is also ingestible so oral satisfaction is guaranteed. It is a non-staining, smooth gliding lubricant. Since the lubricant comes in different liquid size bottles, buy a large bottle to refill a smaller one for travel. Yes, the bottles are refillable. Everyone wins!