On the topic of price the item in question shows as been between $8.50 - $11.50 depending on store in the first zip that instacart loaded (94105). Checking another zip (07081) it's between $7.50 - $11.50. As a result $9.95 does not seem outside normal parameters for this item.

https://www.instacart.com/store/walgreens/products/1585122

The US item is also materially smaller than the UK version. Even if they was the same volume, at $4.29 this is still a considerable increase in cost compared to the UK price.

https://www.instacart.com/store/family-dollar/products/15851...

> The US item is also materially smaller than the UK version.

I'm fairly sure the US version is weight of the product (not including the can), and the UK version is volume.

US version is listed at "NET WT 3.8OZ/107g", where if it was volume (like the UK) it would be listed as "3.8 FL. OZ". [0]

UK version is listed at 250ML (can't find a good image of the listing on the label), so I suspect is volume rather than weight.

[0]:

> Fluid ounces measures the volume of a liquid and net weight measures the mass of a solid. You may have heard of ‘gross weight’ but it shouldn’t be listed on product labels because it can be confusing and misleading to consumers. Gross weight combines the weight of the contents and container, whereas the net weight only measures the contents.

> Since fluid ounces and net weight measure different things, they don’t equal each other. For example, 8 fl. oz. of juice doesn’t equal 8 net wt. oz. of chips.

https://consolidatedlabel.com/label-articles/fluid-ounces-or...