My travel size contact lense solution doesn't have a screw-off top. In order to refill it you have to meticulously pry it off with a flat-head screwdriver. Otherwise, you would just have
Nalgene 2 oz. Leakproof Travel Dropper Bottle | The Container Store
SCREEN SHINE PRO New REFILLABLE 16.9 Oz – WHOOSH!
Walter 53L309 Empty Refillable POWER CLEANER 100 Trigger Sprayer Bottle 500ml / 16.9 fl. oz.
Honeywell UVEX Clear Plus Lens Cleaning Solution - 16 oz & Gallon
Amazon.com: Contact Lens Solution with Lens Case 10 Fl. Oz Bottle (Pack of 1) by Spectapure - Triple Action Cleaner Liquid - Perfect for Cleaning Soft or Silicone Hydrogel Lenses : Health & Household
How to Successfully Travel with Contact Lens Solution - Her Packing List