My DH is addicted to Mountain Dew so we had 5 cubes (24 cans each) put into our container. I also shipped all kinds of spices, dried beans, pecans, etc. No problems with critters. If it's a new bottle of spice it will have the "freshness seal" on it. I figured if McCormick can bottle it and ship it to Wal-Mart like that with no bugs then I can ship it to the UK just fine. Worked for me. I didn't ship any oils, but did ship maple syrup - again new with seals and it was fine. No problems in customs, but it was part of a larger container where the food item boxes were labeled "kitchen ware."