Do you sell the digestion cups (UC475) with out the caps? If so, please send Item#

Item UC474 is the vials without caps.

is ther a lot of digestive 50 ml cups with lot number 1904119?

Yes, that is the lot number for the resin that was put in use in September 2019.

I was wondering what\'s the difference in your caps? Clear is linerless, but the white and green ones have a liner. Do they have a difference in the tightness of fit?

The natural, linerless caps extend the entire length of the neck, while the other two do not. All three caps basically have the same fit with the cup. The natural cap is made from the same polypropylene resin as the cups themselves and have the same background metals levels as stated on the COA.

Do you have a question?

Email me the answer?