Travel is one of the biggest business expenses. Between flights and accommodations, food and a strong Internet connection, it all begins to really add up. However, the airport is one often overlooked place where prices start to spike. It's easy to go through a daily budget in just one layover quickly.

To avoid this from happening and to put money back into your pocket, here are a few quick money-saving tips to remember at the airport and as you set out for your next destination.

Bottled water at the airport can cost upwards of $4, depending on your chosen size and brand. To save on costs, not to mention plastic waste, pack your own refillable water bottle.

Most major airports now have filtered water dispensers to help keep you hydrated. Even though saving a few dollars doesn't sound like much, it's an unnecessary expense you can avoid simply by packing your own water bottle. Plus, it allows you to be eco-conscious at the same time.

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