The Transportation Security Administration approved a quart size bag for liquids.

It seems reasonable for the TSA to ask people to pack their toiletry liquids in a quart size bag.

The general public was asked to solve a math problem in order to determine the sizes of Ziplock bags.We don't want to be Good Will Hunting and bring liquid on planes.

It's incredibly difficult to accurately calculate the volume of the Ziplock bag if you take a flat 2-dimensional bag and put things inside it.

We don't need to be accurate.Not even close.The quart bag rules are a mess.

We do not approve or endore any products.You can go through the checkpoint if the toiletry bag is the same size as a quart-sized bag.Remove the toiletry bag from your carry-on and place it in a separate bin for X-ray screening.

There are lots of bags with different dimensions.When packing your liquids in your carry-on bag, you don't always have a 6 x 9 plastic bag handy.

This calculator is close enough to calculate the volume capacity of a quart-sized toiletry bag.

You can use it when you travel.The formula was created by using a 6 x 9 inch Ziplock bag as a quart.

You can adjust the dimensions of the bag to find out if it's quart-sized.

The sandwich bag is not a good substitute for packing liquid in luggage.It is 6.5 x 5.8 inches and 0.7 quarts.If you use a sandwich bag you will have 70% of the maximum space for liquids on planes.

They don't mean a bag with a volume capacity of 1 quart or 946 liters when they say "quart-sized".

It means a quarter of a gallon.You aren't filling it up with water from the tap because it's a liquids bag.You are filling it with bottles and containers.You won't be able to fit a quarter of a gallon in your quart bag.When planning your packing list, check this post to see how many bottles you can fit.

The TSA wants you to use a plastic bag that is roughly the same size as quart bags.They want your items to be easy to inspect.They want to see the 3.4 oz bottles that you packed inside.The rules were set up that way because of terrorists trying to take liquid explosives on to a plane in 2006 and I don't think much thought has been given to them since.

There must be a better system than the unsustainable plastic bags that will be used in 2020.

It doesn't make sense to worry about the environmental impact of the plastic bag when you are about to fly in an airplane and dump a lot of co2 into the atmosphere.

If you reuse your bag, you might want a bigger bag that is more substantial.

If you are going to buy a clear toiletry bag that is more sturdy you should make sure that it complies with the rules.It should be easy to find something.

Any clear quart size bag can be approved by the TSA.They do not issue a stamp of approval to manufacturers.

These bags have something on them.They are over 1-quart volume because they are smaller than 9 inches on the face.

This bag is an example.There is a top-selling bag on Amazon.

Does it matter?I don't know if it's possible to get through the security checkpoint with a liquids bag.

At the end of the day, it's up to the officer who inspects your bag.

It is almost impossible to find a clear transparent quart bag that is actually a 1-quart size on Amazon, but they all have happy customers regardless.

I recommend buying a bag that isn't flat if you want to travel with a larger bag.The dimensions of the bag are not likely to be checked if the front-facing dimensions are around 6 x 9.

It will pass if it is about the shape of a paperback book.

Yes, it's pretty much.All liquids must be stored in bottles or containers.One baggie is all you can have.It is only one bag per person.

If you want to take liquids larger than 3.4 ounces, you need to pack them in luggage.Baby formula, breast milk, and juice for infants are exceptions to this rule.

A gallon bag has 4 quarts.Even if you only have a quarter full of liquid items, you might have trouble using a large baggie.

They should not.They will sell more bags if they can hold more liquids.

It won't hurt their profits if a small percentage of passengers have a problem.

The rule of thumb is the 3-1-1 rule.The officers are not standing around with measuring tapes.There are only a few violations of the 3-1-1 rule that get noticed.

The lines at security would be massive if quart bag rules were rigorously enforced.

If you want to increase the size of the bag, use a bag with a gusset instead of a flat bag.

Do you want to be compliant?Do you want to try to sneak through some extra liquids?

10 people turn up at the security check-point every day in the US with a loaded firearm, while you are worried about the dimensions of your quart size bag.Go figure!