These refillable bottles are the perfect addition to any traveller's luggage! As a result of my tests, I determined that they are leak-proof, DURABLE, and easy to refill .Whether you're packing shampoo, lotion or sunscreen, these bottles are the ultimate space-savers. The clear design also makes it easy to identify what's inside. The only downside is that they are a bit smaller than I anticipated, but that's a minor issue. Overall, a great investment for any frequent traveller!See full review