I tested a few by filling them with water and leaving them on their side and upside down for a day and nothing leaked. BUT when I put gel polish in them and traveled with them (the reason I bought them) they leaked all over and made a big mess.
Beauticom Professional Clear 10 oz Empty Liquid Pumping Dispenser Bottle with No Wording Label
26 Review
Segbeauty Refillable Soap Dispenser Set, 4 Pack 6.8oz Press Pump Bottles for 𧴠Travel, Lotion, Hand Wash, Shampoo, Conditioner, Shower Gel, Essential Oil - 200ml Empty Cosmetic Containers
38 Review
Beauticom'S Leak Proof Double Wall Clear Jars With Flat Top Lids - Ideal For Creams, Lotions, Make Up, Powders, And Glitters (12 Pieces, Black Lid)
27 Review
Refillable Hand Soap Dispenser Set - 2Pcs 10.1Oz Press Pump Bottles For Home & Hotel Use
33 Review
Teal Thrill: Sorbus Large Clear Makeup Organizer With Detachable Spacious Beauty Display - Ideal Jewelry & Make Up Storage For Vanity, Dresser & Countertop
42 Review
Clear Eyeglasses Display Case Sunglasses Organizer Tray Box Tabletop Holder Stand - 5 Layer MineSign Sticker Display
37 Review
Crystal Clear Cosmetic Bag Set With Zipper, Handle Straps, And Waterproof Features For Stylish And Convenient Packing And Organizing While Traveling By ROYBENS
35 Review
Leopard Narwey Hanging Travel Toiletry Bag: Waterproof Cosmetic Make Up Organizer For Women & Girls
37 Review