I found it so far always a great pity that I "wasted" as much milk during breastfeeding, because I always everything went into the nursing pad. At first I could not imagine that the drip trays could create a great deal remedy. I am pleasantly surprised, because the shells are the soft silicone back practically not noticeable, yet completely sealed. Freezing might be worth not always (I have always been able to catch so about 10ml milk after feeding), but I'll take the milk then just at night to bathe or for baby's skin! I can definitely recommend the drip trays.