<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31449782</termId><termName>vacuum flasks</termName><termType>PT</termType><termNote><![CDATA[ Double-walled vessels designed to regulate the temperature of liquids stored within. Originally invented by Sir James Dewar. Use 'Thermoses (TM)' for the brand name examples of these. With a lowercase initial 'thermoses' is frequently applied loosely to 'vacuum flasks' in general. ]]></termNote><termCreatedDate>2026-03-30 21:01:07</termCreatedDate><relation><relationType>UF</relationType><termId>31449785</termId><termName>flasks, vacuum</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449786</termId><termName>isoleerfles</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449787</termId><termName>thermos</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449788</termId><termName>thermoses</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449789</termId><termName>vacuum bottle</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449790</termId><termName>vacuum flask</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449783</termId><termName>Dewar flasks</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31449784</termId><termName>Dewar vessels</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31426257</termId><termName>flasks</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299386</termId><termName>Thermoses (TM)</termName><termType>PT</termType></relation></term>  </Zthes>